Commit | Line | Data |
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c906108c | 1 | /* DWARF 2 debugging format support for GDB. |
917c78fc | 2 | |
42a4f53d | 3 | Copyright (C) 1994-2019 Free Software Foundation, Inc. |
c906108c SS |
4 | |
5 | Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, | |
6 | Inc. with support from Florida State University (under contract | |
7 | with the Ada Joint Program Office), and Silicon Graphics, Inc. | |
8 | Initial contribution by Brent Benson, Harris Computer Systems, Inc., | |
9 | based on Fred Fish's (Cygnus Support) implementation of DWARF 1 | |
7ce59000 | 10 | support. |
c906108c | 11 | |
c5aa993b | 12 | This file is part of GDB. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is free software; you can redistribute it and/or modify |
15 | it under the terms of the GNU General Public License as published by | |
a9762ec7 JB |
16 | the Free Software Foundation; either version 3 of the License, or |
17 | (at your option) any later version. | |
c906108c | 18 | |
a9762ec7 JB |
19 | This program is distributed in the hope that it will be useful, |
20 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | GNU General Public License for more details. | |
c906108c | 23 | |
c5aa993b | 24 | You should have received a copy of the GNU General Public License |
a9762ec7 | 25 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c | 26 | |
21b2bd31 DE |
27 | /* FIXME: Various die-reading functions need to be more careful with |
28 | reading off the end of the section. | |
29 | E.g., load_partial_dies, read_partial_die. */ | |
30 | ||
c906108c | 31 | #include "defs.h" |
4de283e4 | 32 | #include "dwarf2read.h" |
d55e5aa6 TT |
33 | #include "dwarf-index-cache.h" |
34 | #include "dwarf-index-common.h" | |
4de283e4 TT |
35 | #include "bfd.h" |
36 | #include "elf-bfd.h" | |
37 | #include "symtab.h" | |
38 | #include "gdbtypes.h" | |
39 | #include "objfiles.h" | |
d55e5aa6 | 40 | #include "dwarf2.h" |
4de283e4 TT |
41 | #include "buildsym.h" |
42 | #include "demangle.h" | |
43 | #include "gdb-demangle.h" | |
44 | #include "expression.h" | |
45 | #include "filenames.h" /* for DOSish file names */ | |
46 | #include "macrotab.h" | |
47 | #include "language.h" | |
48 | #include "complaints.h" | |
d55e5aa6 TT |
49 | #include "dwarf2expr.h" |
50 | #include "dwarf2loc.h" | |
4de283e4 TT |
51 | #include "cp-support.h" |
52 | #include "hashtab.h" | |
53 | #include "command.h" | |
d55e5aa6 | 54 | #include "gdbcmd.h" |
4de283e4 TT |
55 | #include "block.h" |
56 | #include "addrmap.h" | |
57 | #include "typeprint.h" | |
58 | #include "psympriv.h" | |
59 | #include <sys/stat.h> | |
60 | #include "completer.h" | |
268a13a5 | 61 | #include "gdbsupport/vec.h" |
4de283e4 | 62 | #include "c-lang.h" |
d55e5aa6 | 63 | #include "go-lang.h" |
4de283e4 TT |
64 | #include "valprint.h" |
65 | #include "gdbcore.h" /* for gnutarget */ | |
66 | #include "gdb/gdb-index.h" | |
67 | #include <ctype.h> | |
68 | #include "gdb_bfd.h" | |
69 | #include "f-lang.h" | |
70 | #include "source.h" | |
268a13a5 | 71 | #include "gdbsupport/filestuff.h" |
4de283e4 | 72 | #include "build-id.h" |
d55e5aa6 | 73 | #include "namespace.h" |
268a13a5 TT |
74 | #include "gdbsupport/gdb_unlinker.h" |
75 | #include "gdbsupport/function-view.h" | |
76 | #include "gdbsupport/gdb_optional.h" | |
77 | #include "gdbsupport/underlying.h" | |
78 | #include "gdbsupport/byte-vector.h" | |
79 | #include "gdbsupport/hash_enum.h" | |
4de283e4 | 80 | #include "filename-seen-cache.h" |
b32b108a | 81 | #include "producer.h" |
4de283e4 TT |
82 | #include <fcntl.h> |
83 | #include <sys/types.h> | |
84 | #include <algorithm> | |
85 | #include <unordered_set> | |
86 | #include <unordered_map> | |
268a13a5 | 87 | #include "gdbsupport/selftest.h" |
4de283e4 TT |
88 | #include <cmath> |
89 | #include <set> | |
90 | #include <forward_list> | |
c9317f21 | 91 | #include "rust-lang.h" |
268a13a5 | 92 | #include "gdbsupport/pathstuff.h" |
437afbb8 | 93 | |
73be47f5 DE |
94 | /* When == 1, print basic high level tracing messages. |
95 | When > 1, be more verbose. | |
b4f54984 DE |
96 | This is in contrast to the low level DIE reading of dwarf_die_debug. */ |
97 | static unsigned int dwarf_read_debug = 0; | |
45cfd468 | 98 | |
d97bc12b | 99 | /* When non-zero, dump DIEs after they are read in. */ |
b4f54984 | 100 | static unsigned int dwarf_die_debug = 0; |
d97bc12b | 101 | |
27e0867f DE |
102 | /* When non-zero, dump line number entries as they are read in. */ |
103 | static unsigned int dwarf_line_debug = 0; | |
104 | ||
491144b5 CB |
105 | /* When true, cross-check physname against demangler. */ |
106 | static bool check_physname = false; | |
900e11f9 | 107 | |
491144b5 CB |
108 | /* When true, do not reject deprecated .gdb_index sections. */ |
109 | static bool use_deprecated_index_sections = false; | |
481860b3 | 110 | |
5bfd760d | 111 | static const struct objfile_key<dwarf2_per_objfile> dwarf2_objfile_data_key; |
6502dd73 | 112 | |
f1e6e072 TT |
113 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
114 | ||
115 | static int dwarf2_locexpr_index; | |
116 | static int dwarf2_loclist_index; | |
117 | static int dwarf2_locexpr_block_index; | |
118 | static int dwarf2_loclist_block_index; | |
119 | ||
3f563c84 PA |
120 | /* An index into a (C++) symbol name component in a symbol name as |
121 | recorded in the mapped_index's symbol table. For each C++ symbol | |
122 | in the symbol table, we record one entry for the start of each | |
123 | component in the symbol in a table of name components, and then | |
124 | sort the table, in order to be able to binary search symbol names, | |
125 | ignoring leading namespaces, both completion and regular look up. | |
126 | For example, for symbol "A::B::C", we'll have an entry that points | |
127 | to "A::B::C", another that points to "B::C", and another for "C". | |
128 | Note that function symbols in GDB index have no parameter | |
129 | information, just the function/method names. You can convert a | |
130 | name_component to a "const char *" using the | |
131 | 'mapped_index::symbol_name_at(offset_type)' method. */ | |
132 | ||
133 | struct name_component | |
134 | { | |
135 | /* Offset in the symbol name where the component starts. Stored as | |
136 | a (32-bit) offset instead of a pointer to save memory and improve | |
137 | locality on 64-bit architectures. */ | |
138 | offset_type name_offset; | |
139 | ||
140 | /* The symbol's index in the symbol and constant pool tables of a | |
141 | mapped_index. */ | |
142 | offset_type idx; | |
143 | }; | |
144 | ||
44ed8f3e PA |
145 | /* Base class containing bits shared by both .gdb_index and |
146 | .debug_name indexes. */ | |
147 | ||
148 | struct mapped_index_base | |
149 | { | |
22ca247e TT |
150 | mapped_index_base () = default; |
151 | DISABLE_COPY_AND_ASSIGN (mapped_index_base); | |
152 | ||
44ed8f3e PA |
153 | /* The name_component table (a sorted vector). See name_component's |
154 | description above. */ | |
155 | std::vector<name_component> name_components; | |
156 | ||
157 | /* How NAME_COMPONENTS is sorted. */ | |
158 | enum case_sensitivity name_components_casing; | |
159 | ||
160 | /* Return the number of names in the symbol table. */ | |
161 | virtual size_t symbol_name_count () const = 0; | |
162 | ||
163 | /* Get the name of the symbol at IDX in the symbol table. */ | |
164 | virtual const char *symbol_name_at (offset_type idx) const = 0; | |
165 | ||
166 | /* Return whether the name at IDX in the symbol table should be | |
167 | ignored. */ | |
168 | virtual bool symbol_name_slot_invalid (offset_type idx) const | |
169 | { | |
170 | return false; | |
171 | } | |
172 | ||
173 | /* Build the symbol name component sorted vector, if we haven't | |
174 | yet. */ | |
175 | void build_name_components (); | |
176 | ||
177 | /* Returns the lower (inclusive) and upper (exclusive) bounds of the | |
178 | possible matches for LN_NO_PARAMS in the name component | |
179 | vector. */ | |
180 | std::pair<std::vector<name_component>::const_iterator, | |
181 | std::vector<name_component>::const_iterator> | |
3b00ef10 TT |
182 | find_name_components_bounds (const lookup_name_info &ln_no_params, |
183 | enum language lang) const; | |
44ed8f3e PA |
184 | |
185 | /* Prevent deleting/destroying via a base class pointer. */ | |
186 | protected: | |
187 | ~mapped_index_base() = default; | |
188 | }; | |
189 | ||
9291a0cd TT |
190 | /* A description of the mapped index. The file format is described in |
191 | a comment by the code that writes the index. */ | |
fc898b42 | 192 | struct mapped_index final : public mapped_index_base |
9291a0cd | 193 | { |
f00a2de2 PA |
194 | /* A slot/bucket in the symbol table hash. */ |
195 | struct symbol_table_slot | |
196 | { | |
197 | const offset_type name; | |
198 | const offset_type vec; | |
199 | }; | |
200 | ||
559a7a62 | 201 | /* Index data format version. */ |
3063847f | 202 | int version = 0; |
559a7a62 | 203 | |
f00a2de2 PA |
204 | /* The address table data. */ |
205 | gdb::array_view<const gdb_byte> address_table; | |
b11b1f88 | 206 | |
3876f04e | 207 | /* The symbol table, implemented as a hash table. */ |
f00a2de2 | 208 | gdb::array_view<symbol_table_slot> symbol_table; |
b11b1f88 | 209 | |
9291a0cd | 210 | /* A pointer to the constant pool. */ |
3063847f | 211 | const char *constant_pool = nullptr; |
3f563c84 | 212 | |
44ed8f3e PA |
213 | bool symbol_name_slot_invalid (offset_type idx) const override |
214 | { | |
215 | const auto &bucket = this->symbol_table[idx]; | |
9ab08412 | 216 | return bucket.name == 0 && bucket.vec == 0; |
44ed8f3e | 217 | } |
5c58de74 | 218 | |
3f563c84 PA |
219 | /* Convenience method to get at the name of the symbol at IDX in the |
220 | symbol table. */ | |
44ed8f3e | 221 | const char *symbol_name_at (offset_type idx) const override |
f00a2de2 | 222 | { return this->constant_pool + MAYBE_SWAP (this->symbol_table[idx].name); } |
5c58de74 | 223 | |
44ed8f3e PA |
224 | size_t symbol_name_count () const override |
225 | { return this->symbol_table.size (); } | |
9291a0cd TT |
226 | }; |
227 | ||
927aa2e7 JK |
228 | /* A description of the mapped .debug_names. |
229 | Uninitialized map has CU_COUNT 0. */ | |
fc898b42 | 230 | struct mapped_debug_names final : public mapped_index_base |
927aa2e7 | 231 | { |
ed2dc618 SM |
232 | mapped_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile_) |
233 | : dwarf2_per_objfile (dwarf2_per_objfile_) | |
234 | {} | |
235 | ||
236 | struct dwarf2_per_objfile *dwarf2_per_objfile; | |
927aa2e7 JK |
237 | bfd_endian dwarf5_byte_order; |
238 | bool dwarf5_is_dwarf64; | |
239 | bool augmentation_is_gdb; | |
240 | uint8_t offset_size; | |
241 | uint32_t cu_count = 0; | |
242 | uint32_t tu_count, bucket_count, name_count; | |
243 | const gdb_byte *cu_table_reordered, *tu_table_reordered; | |
244 | const uint32_t *bucket_table_reordered, *hash_table_reordered; | |
245 | const gdb_byte *name_table_string_offs_reordered; | |
246 | const gdb_byte *name_table_entry_offs_reordered; | |
247 | const gdb_byte *entry_pool; | |
248 | ||
249 | struct index_val | |
250 | { | |
251 | ULONGEST dwarf_tag; | |
252 | struct attr | |
253 | { | |
254 | /* Attribute name DW_IDX_*. */ | |
255 | ULONGEST dw_idx; | |
256 | ||
257 | /* Attribute form DW_FORM_*. */ | |
258 | ULONGEST form; | |
259 | ||
260 | /* Value if FORM is DW_FORM_implicit_const. */ | |
261 | LONGEST implicit_const; | |
262 | }; | |
263 | std::vector<attr> attr_vec; | |
264 | }; | |
265 | ||
266 | std::unordered_map<ULONGEST, index_val> abbrev_map; | |
267 | ||
268 | const char *namei_to_name (uint32_t namei) const; | |
44ed8f3e PA |
269 | |
270 | /* Implementation of the mapped_index_base virtual interface, for | |
271 | the name_components cache. */ | |
272 | ||
273 | const char *symbol_name_at (offset_type idx) const override | |
274 | { return namei_to_name (idx); } | |
275 | ||
276 | size_t symbol_name_count () const override | |
277 | { return this->name_count; } | |
927aa2e7 JK |
278 | }; |
279 | ||
cd4fb1b2 | 280 | /* See dwarf2read.h. */ |
ed2dc618 | 281 | |
cd4fb1b2 | 282 | dwarf2_per_objfile * |
ed2dc618 SM |
283 | get_dwarf2_per_objfile (struct objfile *objfile) |
284 | { | |
5bfd760d | 285 | return dwarf2_objfile_data_key.get (objfile); |
ed2dc618 | 286 | } |
c906108c | 287 | |
251d32d9 | 288 | /* Default names of the debugging sections. */ |
c906108c | 289 | |
233a11ab CS |
290 | /* Note that if the debugging section has been compressed, it might |
291 | have a name like .zdebug_info. */ | |
292 | ||
9cdd5dbd DE |
293 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
294 | { | |
251d32d9 TG |
295 | { ".debug_info", ".zdebug_info" }, |
296 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
297 | { ".debug_line", ".zdebug_line" }, | |
298 | { ".debug_loc", ".zdebug_loc" }, | |
43988095 | 299 | { ".debug_loclists", ".zdebug_loclists" }, |
251d32d9 | 300 | { ".debug_macinfo", ".zdebug_macinfo" }, |
cf2c3c16 | 301 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 | 302 | { ".debug_str", ".zdebug_str" }, |
43988095 | 303 | { ".debug_line_str", ".zdebug_line_str" }, |
251d32d9 | 304 | { ".debug_ranges", ".zdebug_ranges" }, |
43988095 | 305 | { ".debug_rnglists", ".zdebug_rnglists" }, |
251d32d9 | 306 | { ".debug_types", ".zdebug_types" }, |
3019eac3 | 307 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
308 | { ".debug_frame", ".zdebug_frame" }, |
309 | { ".eh_frame", NULL }, | |
24d3216f | 310 | { ".gdb_index", ".zgdb_index" }, |
927aa2e7 JK |
311 | { ".debug_names", ".zdebug_names" }, |
312 | { ".debug_aranges", ".zdebug_aranges" }, | |
24d3216f | 313 | 23 |
251d32d9 | 314 | }; |
c906108c | 315 | |
80626a55 | 316 | /* List of DWO/DWP sections. */ |
3019eac3 | 317 | |
80626a55 | 318 | static const struct dwop_section_names |
3019eac3 DE |
319 | { |
320 | struct dwarf2_section_names abbrev_dwo; | |
321 | struct dwarf2_section_names info_dwo; | |
322 | struct dwarf2_section_names line_dwo; | |
323 | struct dwarf2_section_names loc_dwo; | |
43988095 | 324 | struct dwarf2_section_names loclists_dwo; |
09262596 DE |
325 | struct dwarf2_section_names macinfo_dwo; |
326 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
327 | struct dwarf2_section_names str_dwo; |
328 | struct dwarf2_section_names str_offsets_dwo; | |
329 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
330 | struct dwarf2_section_names cu_index; |
331 | struct dwarf2_section_names tu_index; | |
3019eac3 | 332 | } |
80626a55 | 333 | dwop_section_names = |
3019eac3 DE |
334 | { |
335 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
336 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
337 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
338 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
43988095 | 339 | { ".debug_loclists.dwo", ".zdebug_loclists.dwo" }, |
09262596 DE |
340 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
341 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
342 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
343 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
344 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
345 | { ".debug_cu_index", ".zdebug_cu_index" }, |
346 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
347 | }; |
348 | ||
c906108c SS |
349 | /* local data types */ |
350 | ||
107d2387 AC |
351 | /* The data in a compilation unit header, after target2host |
352 | translation, looks like this. */ | |
c906108c | 353 | struct comp_unit_head |
a738430d | 354 | { |
c764a876 | 355 | unsigned int length; |
a738430d | 356 | short version; |
a738430d MK |
357 | unsigned char addr_size; |
358 | unsigned char signed_addr_p; | |
9c541725 | 359 | sect_offset abbrev_sect_off; |
57349743 | 360 | |
a738430d MK |
361 | /* Size of file offsets; either 4 or 8. */ |
362 | unsigned int offset_size; | |
57349743 | 363 | |
a738430d MK |
364 | /* Size of the length field; either 4 or 12. */ |
365 | unsigned int initial_length_size; | |
57349743 | 366 | |
43988095 JK |
367 | enum dwarf_unit_type unit_type; |
368 | ||
a738430d MK |
369 | /* Offset to the first byte of this compilation unit header in the |
370 | .debug_info section, for resolving relative reference dies. */ | |
9c541725 | 371 | sect_offset sect_off; |
57349743 | 372 | |
d00adf39 DE |
373 | /* Offset to first die in this cu from the start of the cu. |
374 | This will be the first byte following the compilation unit header. */ | |
9c541725 | 375 | cu_offset first_die_cu_offset; |
43988095 | 376 | |
a084a2a6 AT |
377 | |
378 | /* 64-bit signature of this unit. For type units, it denotes the signature of | |
379 | the type (DW_UT_type in DWARF 4, additionally DW_UT_split_type in DWARF 5). | |
380 | Also used in DWARF 5, to denote the dwo id when the unit type is | |
381 | DW_UT_skeleton or DW_UT_split_compile. */ | |
43988095 JK |
382 | ULONGEST signature; |
383 | ||
384 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
9c541725 | 385 | cu_offset type_cu_offset_in_tu; |
a738430d | 386 | }; |
c906108c | 387 | |
3da10d80 KS |
388 | /* Type used for delaying computation of method physnames. |
389 | See comments for compute_delayed_physnames. */ | |
390 | struct delayed_method_info | |
391 | { | |
392 | /* The type to which the method is attached, i.e., its parent class. */ | |
393 | struct type *type; | |
394 | ||
395 | /* The index of the method in the type's function fieldlists. */ | |
396 | int fnfield_index; | |
397 | ||
398 | /* The index of the method in the fieldlist. */ | |
399 | int index; | |
400 | ||
401 | /* The name of the DIE. */ | |
402 | const char *name; | |
403 | ||
404 | /* The DIE associated with this method. */ | |
405 | struct die_info *die; | |
406 | }; | |
407 | ||
e7c27a73 DJ |
408 | /* Internal state when decoding a particular compilation unit. */ |
409 | struct dwarf2_cu | |
410 | { | |
fcd3b13d SM |
411 | explicit dwarf2_cu (struct dwarf2_per_cu_data *per_cu); |
412 | ~dwarf2_cu (); | |
413 | ||
414 | DISABLE_COPY_AND_ASSIGN (dwarf2_cu); | |
415 | ||
c24bdb02 KS |
416 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
417 | Create the set of symtabs used by this TU, or if this TU is sharing | |
418 | symtabs with another TU and the symtabs have already been created | |
419 | then restore those symtabs in the line header. | |
420 | We don't need the pc/line-number mapping for type units. */ | |
421 | void setup_type_unit_groups (struct die_info *die); | |
422 | ||
423 | /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the | |
424 | buildsym_compunit constructor. */ | |
425 | struct compunit_symtab *start_symtab (const char *name, | |
426 | const char *comp_dir, | |
427 | CORE_ADDR low_pc); | |
428 | ||
429 | /* Reset the builder. */ | |
430 | void reset_builder () { m_builder.reset (); } | |
431 | ||
d00adf39 | 432 | /* The header of the compilation unit. */ |
fcd3b13d | 433 | struct comp_unit_head header {}; |
e142c38c | 434 | |
d00adf39 | 435 | /* Base address of this compilation unit. */ |
fcd3b13d | 436 | CORE_ADDR base_address = 0; |
d00adf39 DE |
437 | |
438 | /* Non-zero if base_address has been set. */ | |
fcd3b13d | 439 | int base_known = 0; |
d00adf39 | 440 | |
e142c38c | 441 | /* The language we are debugging. */ |
fcd3b13d SM |
442 | enum language language = language_unknown; |
443 | const struct language_defn *language_defn = nullptr; | |
e142c38c | 444 | |
fcd3b13d | 445 | const char *producer = nullptr; |
b0f35d58 | 446 | |
c24bdb02 | 447 | private: |
804d2729 TT |
448 | /* The symtab builder for this CU. This is only non-NULL when full |
449 | symbols are being read. */ | |
c24bdb02 | 450 | std::unique_ptr<buildsym_compunit> m_builder; |
804d2729 | 451 | |
c24bdb02 | 452 | public: |
e142c38c DJ |
453 | /* The generic symbol table building routines have separate lists for |
454 | file scope symbols and all all other scopes (local scopes). So | |
455 | we need to select the right one to pass to add_symbol_to_list(). | |
456 | We do it by keeping a pointer to the correct list in list_in_scope. | |
457 | ||
458 | FIXME: The original dwarf code just treated the file scope as the | |
459 | first local scope, and all other local scopes as nested local | |
460 | scopes, and worked fine. Check to see if we really need to | |
461 | distinguish these in buildsym.c. */ | |
fcd3b13d | 462 | struct pending **list_in_scope = nullptr; |
e142c38c | 463 | |
b64f50a1 JK |
464 | /* Hash table holding all the loaded partial DIEs |
465 | with partial_die->offset.SECT_OFF as hash. */ | |
fcd3b13d | 466 | htab_t partial_dies = nullptr; |
72bf9492 DJ |
467 | |
468 | /* Storage for things with the same lifetime as this read-in compilation | |
469 | unit, including partial DIEs. */ | |
fcd3b13d | 470 | auto_obstack comp_unit_obstack; |
72bf9492 | 471 | |
ae038cb0 DJ |
472 | /* When multiple dwarf2_cu structures are living in memory, this field |
473 | chains them all together, so that they can be released efficiently. | |
474 | We will probably also want a generation counter so that most-recently-used | |
475 | compilation units are cached... */ | |
fcd3b13d | 476 | struct dwarf2_per_cu_data *read_in_chain = nullptr; |
ae038cb0 | 477 | |
69d751e3 | 478 | /* Backlink to our per_cu entry. */ |
ae038cb0 DJ |
479 | struct dwarf2_per_cu_data *per_cu; |
480 | ||
481 | /* How many compilation units ago was this CU last referenced? */ | |
fcd3b13d | 482 | int last_used = 0; |
ae038cb0 | 483 | |
b64f50a1 JK |
484 | /* A hash table of DIE cu_offset for following references with |
485 | die_info->offset.sect_off as hash. */ | |
fcd3b13d | 486 | htab_t die_hash = nullptr; |
10b3939b DJ |
487 | |
488 | /* Full DIEs if read in. */ | |
fcd3b13d | 489 | struct die_info *dies = nullptr; |
10b3939b DJ |
490 | |
491 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
492 | units referenced by this one. Only set during full symbol processing; | |
493 | partial symbol tables do not have dependencies. */ | |
fcd3b13d | 494 | htab_t dependencies = nullptr; |
10b3939b | 495 | |
cb1df416 | 496 | /* Header data from the line table, during full symbol processing. */ |
fcd3b13d | 497 | struct line_header *line_header = nullptr; |
4c8aa72d PA |
498 | /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise, |
499 | it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL, | |
500 | this is the DW_TAG_compile_unit die for this CU. We'll hold on | |
501 | to the line header as long as this DIE is being processed. See | |
502 | process_die_scope. */ | |
fcd3b13d | 503 | die_info *line_header_die_owner = nullptr; |
cb1df416 | 504 | |
3da10d80 KS |
505 | /* A list of methods which need to have physnames computed |
506 | after all type information has been read. */ | |
c89b44cd | 507 | std::vector<delayed_method_info> method_list; |
3da10d80 | 508 | |
96408a79 | 509 | /* To be copied to symtab->call_site_htab. */ |
fcd3b13d | 510 | htab_t call_site_htab = nullptr; |
96408a79 | 511 | |
034e5797 DE |
512 | /* Non-NULL if this CU came from a DWO file. |
513 | There is an invariant here that is important to remember: | |
514 | Except for attributes copied from the top level DIE in the "main" | |
515 | (or "stub") file in preparation for reading the DWO file | |
516 | (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU. | |
517 | Either there isn't a DWO file (in which case this is NULL and the point | |
518 | is moot), or there is and either we're not going to read it (in which | |
519 | case this is NULL) or there is and we are reading it (in which case this | |
520 | is non-NULL). */ | |
fcd3b13d | 521 | struct dwo_unit *dwo_unit = nullptr; |
3019eac3 DE |
522 | |
523 | /* The DW_AT_addr_base attribute if present, zero otherwise | |
524 | (zero is a valid value though). | |
1dbab08b | 525 | Note this value comes from the Fission stub CU/TU's DIE. */ |
fcd3b13d | 526 | ULONGEST addr_base = 0; |
3019eac3 | 527 | |
2e3cf129 DE |
528 | /* The DW_AT_ranges_base attribute if present, zero otherwise |
529 | (zero is a valid value though). | |
1dbab08b | 530 | Note this value comes from the Fission stub CU/TU's DIE. |
2e3cf129 | 531 | Also note that the value is zero in the non-DWO case so this value can |
ab435259 DE |
532 | be used without needing to know whether DWO files are in use or not. |
533 | N.B. This does not apply to DW_AT_ranges appearing in | |
534 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
535 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
536 | DW_AT_ranges_base *would* have to be applied, and we'd have to care | |
537 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ | |
fcd3b13d | 538 | ULONGEST ranges_base = 0; |
2e3cf129 | 539 | |
c9317f21 TT |
540 | /* When reading debug info generated by older versions of rustc, we |
541 | have to rewrite some union types to be struct types with a | |
542 | variant part. This rewriting must be done after the CU is fully | |
543 | read in, because otherwise at the point of rewriting some struct | |
544 | type might not have been fully processed. So, we keep a list of | |
545 | all such types here and process them after expansion. */ | |
546 | std::vector<struct type *> rust_unions; | |
547 | ||
ae038cb0 | 548 | /* Mark used when releasing cached dies. */ |
9068261f | 549 | bool mark : 1; |
ae038cb0 | 550 | |
8be455d7 JK |
551 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
552 | This test is imperfect as there may exist optimized debug code not using | |
553 | any location list and still facing inlining issues if handled as | |
554 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
9068261f | 555 | bool has_loclist : 1; |
ba919b58 | 556 | |
9068261f | 557 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is true |
1b80a9fa JK |
558 | if all the producer_is_* fields are valid. This information is cached |
559 | because profiling CU expansion showed excessive time spent in | |
560 | producer_is_gxx_lt_4_6. */ | |
9068261f AB |
561 | bool checked_producer : 1; |
562 | bool producer_is_gxx_lt_4_6 : 1; | |
563 | bool producer_is_gcc_lt_4_3 : 1; | |
eb77c9df | 564 | bool producer_is_icc : 1; |
9068261f | 565 | bool producer_is_icc_lt_14 : 1; |
c258c396 | 566 | bool producer_is_codewarrior : 1; |
4d4ec4e5 | 567 | |
9068261f | 568 | /* When true, the file that we're processing is known to have |
4d4ec4e5 TT |
569 | debugging info for C++ namespaces. GCC 3.3.x did not produce |
570 | this information, but later versions do. */ | |
571 | ||
9068261f | 572 | bool processing_has_namespace_info : 1; |
d590ff25 YQ |
573 | |
574 | struct partial_die_info *find_partial_die (sect_offset sect_off); | |
c24bdb02 KS |
575 | |
576 | /* If this CU was inherited by another CU (via specification, | |
577 | abstract_origin, etc), this is the ancestor CU. */ | |
578 | dwarf2_cu *ancestor; | |
579 | ||
580 | /* Get the buildsym_compunit for this CU. */ | |
581 | buildsym_compunit *get_builder () | |
582 | { | |
583 | /* If this CU has a builder associated with it, use that. */ | |
584 | if (m_builder != nullptr) | |
585 | return m_builder.get (); | |
586 | ||
587 | /* Otherwise, search ancestors for a valid builder. */ | |
588 | if (ancestor != nullptr) | |
589 | return ancestor->get_builder (); | |
590 | ||
591 | return nullptr; | |
592 | } | |
e7c27a73 DJ |
593 | }; |
594 | ||
094b34ac DE |
595 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
596 | This includes type_unit_group and quick_file_names. */ | |
597 | ||
598 | struct stmt_list_hash | |
599 | { | |
600 | /* The DWO unit this table is from or NULL if there is none. */ | |
601 | struct dwo_unit *dwo_unit; | |
602 | ||
603 | /* Offset in .debug_line or .debug_line.dwo. */ | |
9c541725 | 604 | sect_offset line_sect_off; |
094b34ac DE |
605 | }; |
606 | ||
f4dc4d17 DE |
607 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
608 | an object of this type. */ | |
609 | ||
610 | struct type_unit_group | |
611 | { | |
0186c6a7 | 612 | /* dwarf2read.c's main "handle" on a TU symtab. |
f4dc4d17 DE |
613 | To simplify things we create an artificial CU that "includes" all the |
614 | type units using this stmt_list so that the rest of the code still has | |
615 | a "per_cu" handle on the symtab. | |
616 | This PER_CU is recognized by having no section. */ | |
8a0459fd | 617 | #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL) |
094b34ac DE |
618 | struct dwarf2_per_cu_data per_cu; |
619 | ||
0186c6a7 DE |
620 | /* The TUs that share this DW_AT_stmt_list entry. |
621 | This is added to while parsing type units to build partial symtabs, | |
622 | and is deleted afterwards and not used again. */ | |
a8b3b8e9 | 623 | std::vector<signatured_type *> *tus; |
f4dc4d17 | 624 | |
43f3e411 | 625 | /* The compunit symtab. |
094b34ac | 626 | Type units in a group needn't all be defined in the same source file, |
43f3e411 DE |
627 | so we create an essentially anonymous symtab as the compunit symtab. */ |
628 | struct compunit_symtab *compunit_symtab; | |
f4dc4d17 | 629 | |
094b34ac DE |
630 | /* The data used to construct the hash key. */ |
631 | struct stmt_list_hash hash; | |
f4dc4d17 DE |
632 | |
633 | /* The number of symtabs from the line header. | |
634 | The value here must match line_header.num_file_names. */ | |
635 | unsigned int num_symtabs; | |
636 | ||
637 | /* The symbol tables for this TU (obtained from the files listed in | |
638 | DW_AT_stmt_list). | |
639 | WARNING: The order of entries here must match the order of entries | |
640 | in the line header. After the first TU using this type_unit_group, the | |
641 | line header for the subsequent TUs is recreated from this. This is done | |
642 | because we need to use the same symtabs for each TU using the same | |
643 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
644 | there's no guarantee the line header doesn't have duplicate entries. */ | |
645 | struct symtab **symtabs; | |
646 | }; | |
647 | ||
73869dc2 | 648 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
3019eac3 DE |
649 | |
650 | struct dwo_sections | |
651 | { | |
652 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
653 | struct dwarf2_section_info line; |
654 | struct dwarf2_section_info loc; | |
43988095 | 655 | struct dwarf2_section_info loclists; |
09262596 DE |
656 | struct dwarf2_section_info macinfo; |
657 | struct dwarf2_section_info macro; | |
3019eac3 DE |
658 | struct dwarf2_section_info str; |
659 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
660 | /* In the case of a virtual DWO file, these two are unused. */ |
661 | struct dwarf2_section_info info; | |
fd5866f6 | 662 | std::vector<dwarf2_section_info> types; |
3019eac3 DE |
663 | }; |
664 | ||
c88ee1f0 | 665 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
666 | |
667 | struct dwo_unit | |
668 | { | |
669 | /* Backlink to the containing struct dwo_file. */ | |
670 | struct dwo_file *dwo_file; | |
671 | ||
672 | /* The "id" that distinguishes this CU/TU. | |
673 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
674 | Since signatures came first, we stick with it for consistency. */ | |
675 | ULONGEST signature; | |
676 | ||
677 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 678 | struct dwarf2_section_info *section; |
3019eac3 | 679 | |
9c541725 PA |
680 | /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */ |
681 | sect_offset sect_off; | |
3019eac3 DE |
682 | unsigned int length; |
683 | ||
684 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
685 | cu_offset type_offset_in_tu; | |
686 | }; | |
687 | ||
73869dc2 DE |
688 | /* include/dwarf2.h defines the DWP section codes. |
689 | It defines a max value but it doesn't define a min value, which we | |
690 | use for error checking, so provide one. */ | |
691 | ||
692 | enum dwp_v2_section_ids | |
693 | { | |
694 | DW_SECT_MIN = 1 | |
695 | }; | |
696 | ||
80626a55 | 697 | /* Data for one DWO file. |
57d63ce2 DE |
698 | |
699 | This includes virtual DWO files (a virtual DWO file is a DWO file as it | |
700 | appears in a DWP file). DWP files don't really have DWO files per se - | |
701 | comdat folding of types "loses" the DWO file they came from, and from | |
702 | a high level view DWP files appear to contain a mass of random types. | |
703 | However, to maintain consistency with the non-DWP case we pretend DWP | |
704 | files contain virtual DWO files, and we assign each TU with one virtual | |
705 | DWO file (generally based on the line and abbrev section offsets - | |
706 | a heuristic that seems to work in practice). */ | |
3019eac3 DE |
707 | |
708 | struct dwo_file | |
709 | { | |
51ac9db5 SM |
710 | dwo_file () = default; |
711 | DISABLE_COPY_AND_ASSIGN (dwo_file); | |
712 | ||
0ac5b59e | 713 | /* The DW_AT_GNU_dwo_name attribute. |
80626a55 DE |
714 | For virtual DWO files the name is constructed from the section offsets |
715 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
716 | from related CU+TUs. */ | |
51ac9db5 | 717 | const char *dwo_name = nullptr; |
0ac5b59e DE |
718 | |
719 | /* The DW_AT_comp_dir attribute. */ | |
51ac9db5 | 720 | const char *comp_dir = nullptr; |
3019eac3 | 721 | |
80626a55 DE |
722 | /* The bfd, when the file is open. Otherwise this is NULL. |
723 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
fb1eb2f9 | 724 | gdb_bfd_ref_ptr dbfd; |
3019eac3 | 725 | |
73869dc2 DE |
726 | /* The sections that make up this DWO file. |
727 | Remember that for virtual DWO files in DWP V2, these are virtual | |
728 | sections (for lack of a better name). */ | |
51ac9db5 | 729 | struct dwo_sections sections {}; |
3019eac3 | 730 | |
33c5cd75 DB |
731 | /* The CUs in the file. |
732 | Each element is a struct dwo_unit. Multiple CUs per DWO are supported as | |
733 | an extension to handle LLVM's Link Time Optimization output (where | |
734 | multiple source files may be compiled into a single object/dwo pair). */ | |
51ac9db5 | 735 | htab_t cus {}; |
3019eac3 DE |
736 | |
737 | /* Table of TUs in the file. | |
738 | Each element is a struct dwo_unit. */ | |
51ac9db5 | 739 | htab_t tus {}; |
3019eac3 DE |
740 | }; |
741 | ||
80626a55 DE |
742 | /* These sections are what may appear in a DWP file. */ |
743 | ||
744 | struct dwp_sections | |
745 | { | |
73869dc2 | 746 | /* These are used by both DWP version 1 and 2. */ |
80626a55 DE |
747 | struct dwarf2_section_info str; |
748 | struct dwarf2_section_info cu_index; | |
749 | struct dwarf2_section_info tu_index; | |
73869dc2 DE |
750 | |
751 | /* These are only used by DWP version 2 files. | |
752 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other | |
753 | sections are referenced by section number, and are not recorded here. | |
754 | In DWP version 2 there is at most one copy of all these sections, each | |
755 | section being (effectively) comprised of the concatenation of all of the | |
756 | individual sections that exist in the version 1 format. | |
757 | To keep the code simple we treat each of these concatenated pieces as a | |
758 | section itself (a virtual section?). */ | |
759 | struct dwarf2_section_info abbrev; | |
760 | struct dwarf2_section_info info; | |
761 | struct dwarf2_section_info line; | |
762 | struct dwarf2_section_info loc; | |
763 | struct dwarf2_section_info macinfo; | |
764 | struct dwarf2_section_info macro; | |
765 | struct dwarf2_section_info str_offsets; | |
766 | struct dwarf2_section_info types; | |
80626a55 DE |
767 | }; |
768 | ||
73869dc2 DE |
769 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
770 | A virtual DWO file is a DWO file as it appears in a DWP file. */ | |
80626a55 | 771 | |
73869dc2 | 772 | struct virtual_v1_dwo_sections |
80626a55 DE |
773 | { |
774 | struct dwarf2_section_info abbrev; | |
775 | struct dwarf2_section_info line; | |
776 | struct dwarf2_section_info loc; | |
777 | struct dwarf2_section_info macinfo; | |
778 | struct dwarf2_section_info macro; | |
779 | struct dwarf2_section_info str_offsets; | |
780 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 781 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
782 | struct dwarf2_section_info info_or_types; |
783 | }; | |
784 | ||
73869dc2 DE |
785 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2. |
786 | In version 2, the sections of the DWO files are concatenated together | |
787 | and stored in one section of that name. Thus each ELF section contains | |
788 | several "virtual" sections. */ | |
789 | ||
790 | struct virtual_v2_dwo_sections | |
791 | { | |
792 | bfd_size_type abbrev_offset; | |
793 | bfd_size_type abbrev_size; | |
794 | ||
795 | bfd_size_type line_offset; | |
796 | bfd_size_type line_size; | |
797 | ||
798 | bfd_size_type loc_offset; | |
799 | bfd_size_type loc_size; | |
800 | ||
801 | bfd_size_type macinfo_offset; | |
802 | bfd_size_type macinfo_size; | |
803 | ||
804 | bfd_size_type macro_offset; | |
805 | bfd_size_type macro_size; | |
806 | ||
807 | bfd_size_type str_offsets_offset; | |
808 | bfd_size_type str_offsets_size; | |
809 | ||
810 | /* Each DWP hash table entry records one CU or one TU. | |
811 | That is recorded here, and copied to dwo_unit.section. */ | |
812 | bfd_size_type info_or_types_offset; | |
813 | bfd_size_type info_or_types_size; | |
814 | }; | |
815 | ||
80626a55 DE |
816 | /* Contents of DWP hash tables. */ |
817 | ||
818 | struct dwp_hash_table | |
819 | { | |
73869dc2 | 820 | uint32_t version, nr_columns; |
80626a55 | 821 | uint32_t nr_units, nr_slots; |
73869dc2 DE |
822 | const gdb_byte *hash_table, *unit_table; |
823 | union | |
824 | { | |
825 | struct | |
826 | { | |
827 | const gdb_byte *indices; | |
828 | } v1; | |
829 | struct | |
830 | { | |
831 | /* This is indexed by column number and gives the id of the section | |
832 | in that column. */ | |
833 | #define MAX_NR_V2_DWO_SECTIONS \ | |
834 | (1 /* .debug_info or .debug_types */ \ | |
835 | + 1 /* .debug_abbrev */ \ | |
836 | + 1 /* .debug_line */ \ | |
837 | + 1 /* .debug_loc */ \ | |
838 | + 1 /* .debug_str_offsets */ \ | |
839 | + 1 /* .debug_macro or .debug_macinfo */) | |
840 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; | |
841 | const gdb_byte *offsets; | |
842 | const gdb_byte *sizes; | |
843 | } v2; | |
844 | } section_pool; | |
80626a55 DE |
845 | }; |
846 | ||
847 | /* Data for one DWP file. */ | |
848 | ||
849 | struct dwp_file | |
850 | { | |
400174b1 TT |
851 | dwp_file (const char *name_, gdb_bfd_ref_ptr &&abfd) |
852 | : name (name_), | |
853 | dbfd (std::move (abfd)) | |
854 | { | |
855 | } | |
856 | ||
80626a55 DE |
857 | /* Name of the file. */ |
858 | const char *name; | |
859 | ||
73869dc2 | 860 | /* File format version. */ |
400174b1 | 861 | int version = 0; |
73869dc2 | 862 | |
93417882 | 863 | /* The bfd. */ |
400174b1 | 864 | gdb_bfd_ref_ptr dbfd; |
80626a55 DE |
865 | |
866 | /* Section info for this file. */ | |
400174b1 | 867 | struct dwp_sections sections {}; |
80626a55 | 868 | |
57d63ce2 | 869 | /* Table of CUs in the file. */ |
400174b1 | 870 | const struct dwp_hash_table *cus = nullptr; |
80626a55 DE |
871 | |
872 | /* Table of TUs in the file. */ | |
400174b1 | 873 | const struct dwp_hash_table *tus = nullptr; |
80626a55 | 874 | |
19ac8c2e | 875 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
400174b1 TT |
876 | htab_t loaded_cus {}; |
877 | htab_t loaded_tus {}; | |
80626a55 | 878 | |
73869dc2 DE |
879 | /* Table to map ELF section numbers to their sections. |
880 | This is only needed for the DWP V1 file format. */ | |
400174b1 TT |
881 | unsigned int num_sections = 0; |
882 | asection **elf_sections = nullptr; | |
80626a55 DE |
883 | }; |
884 | ||
0963b4bd MS |
885 | /* Struct used to pass misc. parameters to read_die_and_children, et |
886 | al. which are used for both .debug_info and .debug_types dies. | |
887 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 888 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
889 | |
890 | struct die_reader_specs | |
891 | { | |
a32a8923 | 892 | /* The bfd of die_section. */ |
93311388 DE |
893 | bfd* abfd; |
894 | ||
895 | /* The CU of the DIE we are parsing. */ | |
896 | struct dwarf2_cu *cu; | |
897 | ||
80626a55 | 898 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
899 | struct dwo_file *dwo_file; |
900 | ||
dee91e82 | 901 | /* The section the die comes from. |
3019eac3 | 902 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
903 | struct dwarf2_section_info *die_section; |
904 | ||
905 | /* die_section->buffer. */ | |
d521ce57 | 906 | const gdb_byte *buffer; |
f664829e DE |
907 | |
908 | /* The end of the buffer. */ | |
909 | const gdb_byte *buffer_end; | |
a2ce51a0 DE |
910 | |
911 | /* The value of the DW_AT_comp_dir attribute. */ | |
912 | const char *comp_dir; | |
685af9cd TT |
913 | |
914 | /* The abbreviation table to use when reading the DIEs. */ | |
915 | struct abbrev_table *abbrev_table; | |
93311388 DE |
916 | }; |
917 | ||
fd820528 | 918 | /* Type of function passed to init_cutu_and_read_dies, et.al. */ |
dee91e82 | 919 | typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader, |
d521ce57 | 920 | const gdb_byte *info_ptr, |
dee91e82 DE |
921 | struct die_info *comp_unit_die, |
922 | int has_children, | |
923 | void *data); | |
924 | ||
ecfb656c PA |
925 | /* A 1-based directory index. This is a strong typedef to prevent |
926 | accidentally using a directory index as a 0-based index into an | |
927 | array/vector. */ | |
928 | enum class dir_index : unsigned int {}; | |
929 | ||
930 | /* Likewise, a 1-based file name index. */ | |
931 | enum class file_name_index : unsigned int {}; | |
932 | ||
52059ffd TT |
933 | struct file_entry |
934 | { | |
fff8551c PA |
935 | file_entry () = default; |
936 | ||
ecfb656c | 937 | file_entry (const char *name_, dir_index d_index_, |
fff8551c PA |
938 | unsigned int mod_time_, unsigned int length_) |
939 | : name (name_), | |
ecfb656c | 940 | d_index (d_index_), |
fff8551c PA |
941 | mod_time (mod_time_), |
942 | length (length_) | |
943 | {} | |
944 | ||
ecfb656c PA |
945 | /* Return the include directory at D_INDEX stored in LH. Returns |
946 | NULL if D_INDEX is out of bounds. */ | |
8c43009f PA |
947 | const char *include_dir (const line_header *lh) const; |
948 | ||
fff8551c PA |
949 | /* The file name. Note this is an observing pointer. The memory is |
950 | owned by debug_line_buffer. */ | |
951 | const char *name {}; | |
952 | ||
8c43009f | 953 | /* The directory index (1-based). */ |
ecfb656c | 954 | dir_index d_index {}; |
fff8551c PA |
955 | |
956 | unsigned int mod_time {}; | |
957 | ||
958 | unsigned int length {}; | |
959 | ||
960 | /* True if referenced by the Line Number Program. */ | |
961 | bool included_p {}; | |
962 | ||
83769d0b | 963 | /* The associated symbol table, if any. */ |
fff8551c | 964 | struct symtab *symtab {}; |
52059ffd TT |
965 | }; |
966 | ||
debd256d JB |
967 | /* The line number information for a compilation unit (found in the |
968 | .debug_line section) begins with a "statement program header", | |
969 | which contains the following information. */ | |
970 | struct line_header | |
971 | { | |
fff8551c PA |
972 | line_header () |
973 | : offset_in_dwz {} | |
974 | {} | |
975 | ||
976 | /* Add an entry to the include directory table. */ | |
977 | void add_include_dir (const char *include_dir); | |
978 | ||
979 | /* Add an entry to the file name table. */ | |
ecfb656c | 980 | void add_file_name (const char *name, dir_index d_index, |
fff8551c PA |
981 | unsigned int mod_time, unsigned int length); |
982 | ||
ecfb656c | 983 | /* Return the include dir at INDEX (1-based). Returns NULL if INDEX |
8c43009f | 984 | is out of bounds. */ |
ecfb656c | 985 | const char *include_dir_at (dir_index index) const |
8c43009f | 986 | { |
ecfb656c PA |
987 | /* Convert directory index number (1-based) to vector index |
988 | (0-based). */ | |
989 | size_t vec_index = to_underlying (index) - 1; | |
990 | ||
991 | if (vec_index >= include_dirs.size ()) | |
8c43009f | 992 | return NULL; |
ecfb656c | 993 | return include_dirs[vec_index]; |
8c43009f PA |
994 | } |
995 | ||
ecfb656c | 996 | /* Return the file name at INDEX (1-based). Returns NULL if INDEX |
8c43009f | 997 | is out of bounds. */ |
ecfb656c | 998 | file_entry *file_name_at (file_name_index index) |
8c43009f | 999 | { |
ecfb656c PA |
1000 | /* Convert file name index number (1-based) to vector index |
1001 | (0-based). */ | |
1002 | size_t vec_index = to_underlying (index) - 1; | |
1003 | ||
1004 | if (vec_index >= file_names.size ()) | |
fff8551c | 1005 | return NULL; |
ecfb656c | 1006 | return &file_names[vec_index]; |
fff8551c PA |
1007 | } |
1008 | ||
527f3840 | 1009 | /* Offset of line number information in .debug_line section. */ |
9c541725 | 1010 | sect_offset sect_off {}; |
527f3840 JK |
1011 | |
1012 | /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */ | |
fff8551c PA |
1013 | unsigned offset_in_dwz : 1; /* Can't initialize bitfields in-class. */ |
1014 | ||
1015 | unsigned int total_length {}; | |
1016 | unsigned short version {}; | |
1017 | unsigned int header_length {}; | |
1018 | unsigned char minimum_instruction_length {}; | |
1019 | unsigned char maximum_ops_per_instruction {}; | |
1020 | unsigned char default_is_stmt {}; | |
1021 | int line_base {}; | |
1022 | unsigned char line_range {}; | |
1023 | unsigned char opcode_base {}; | |
debd256d JB |
1024 | |
1025 | /* standard_opcode_lengths[i] is the number of operands for the | |
1026 | standard opcode whose value is i. This means that | |
1027 | standard_opcode_lengths[0] is unused, and the last meaningful | |
1028 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
fff8551c | 1029 | std::unique_ptr<unsigned char[]> standard_opcode_lengths; |
debd256d | 1030 | |
fff8551c PA |
1031 | /* The include_directories table. Note these are observing |
1032 | pointers. The memory is owned by debug_line_buffer. */ | |
1033 | std::vector<const char *> include_dirs; | |
debd256d | 1034 | |
fff8551c PA |
1035 | /* The file_names table. */ |
1036 | std::vector<file_entry> file_names; | |
debd256d JB |
1037 | |
1038 | /* The start and end of the statement program following this | |
6502dd73 | 1039 | header. These point into dwarf2_per_objfile->line_buffer. */ |
fff8551c | 1040 | const gdb_byte *statement_program_start {}, *statement_program_end {}; |
debd256d | 1041 | }; |
c906108c | 1042 | |
fff8551c PA |
1043 | typedef std::unique_ptr<line_header> line_header_up; |
1044 | ||
8c43009f PA |
1045 | const char * |
1046 | file_entry::include_dir (const line_header *lh) const | |
1047 | { | |
ecfb656c | 1048 | return lh->include_dir_at (d_index); |
8c43009f PA |
1049 | } |
1050 | ||
c906108c | 1051 | /* When we construct a partial symbol table entry we only |
0963b4bd | 1052 | need this much information. */ |
6f06d47b | 1053 | struct partial_die_info : public allocate_on_obstack |
c906108c | 1054 | { |
6f06d47b YQ |
1055 | partial_die_info (sect_offset sect_off, struct abbrev_info *abbrev); |
1056 | ||
1057 | /* Disable assign but still keep copy ctor, which is needed | |
1058 | load_partial_dies. */ | |
1059 | partial_die_info& operator=(const partial_die_info& rhs) = delete; | |
1060 | ||
52356b79 YQ |
1061 | /* Adjust the partial die before generating a symbol for it. This |
1062 | function may set the is_external flag or change the DIE's | |
1063 | name. */ | |
1064 | void fixup (struct dwarf2_cu *cu); | |
1065 | ||
48fbe735 YQ |
1066 | /* Read a minimal amount of information into the minimal die |
1067 | structure. */ | |
1068 | const gdb_byte *read (const struct die_reader_specs *reader, | |
1069 | const struct abbrev_info &abbrev, | |
1070 | const gdb_byte *info_ptr); | |
1071 | ||
72bf9492 | 1072 | /* Offset of this DIE. */ |
6f06d47b | 1073 | const sect_offset sect_off; |
72bf9492 DJ |
1074 | |
1075 | /* DWARF-2 tag for this DIE. */ | |
6f06d47b | 1076 | const ENUM_BITFIELD(dwarf_tag) tag : 16; |
72bf9492 | 1077 | |
72bf9492 | 1078 | /* Assorted flags describing the data found in this DIE. */ |
6f06d47b YQ |
1079 | const unsigned int has_children : 1; |
1080 | ||
72bf9492 DJ |
1081 | unsigned int is_external : 1; |
1082 | unsigned int is_declaration : 1; | |
1083 | unsigned int has_type : 1; | |
1084 | unsigned int has_specification : 1; | |
1085 | unsigned int has_pc_info : 1; | |
481860b3 | 1086 | unsigned int may_be_inlined : 1; |
72bf9492 | 1087 | |
0c1b455e TT |
1088 | /* This DIE has been marked DW_AT_main_subprogram. */ |
1089 | unsigned int main_subprogram : 1; | |
1090 | ||
72bf9492 DJ |
1091 | /* Flag set if the SCOPE field of this structure has been |
1092 | computed. */ | |
1093 | unsigned int scope_set : 1; | |
1094 | ||
fa4028e9 JB |
1095 | /* Flag set if the DIE has a byte_size attribute. */ |
1096 | unsigned int has_byte_size : 1; | |
1097 | ||
ff908ebf AW |
1098 | /* Flag set if the DIE has a DW_AT_const_value attribute. */ |
1099 | unsigned int has_const_value : 1; | |
1100 | ||
98bfdba5 PA |
1101 | /* Flag set if any of the DIE's children are template arguments. */ |
1102 | unsigned int has_template_arguments : 1; | |
1103 | ||
52356b79 | 1104 | /* Flag set if fixup has been called on this die. */ |
abc72ce4 DE |
1105 | unsigned int fixup_called : 1; |
1106 | ||
36586728 TT |
1107 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
1108 | unsigned int is_dwz : 1; | |
1109 | ||
1110 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
1111 | unsigned int spec_is_dwz : 1; | |
1112 | ||
72bf9492 | 1113 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 1114 | sometimes a default name for unnamed DIEs. */ |
6f06d47b | 1115 | const char *name = nullptr; |
72bf9492 | 1116 | |
abc72ce4 | 1117 | /* The linkage name, if present. */ |
6f06d47b | 1118 | const char *linkage_name = nullptr; |
abc72ce4 | 1119 | |
72bf9492 DJ |
1120 | /* The scope to prepend to our children. This is generally |
1121 | allocated on the comp_unit_obstack, so will disappear | |
1122 | when this compilation unit leaves the cache. */ | |
6f06d47b | 1123 | const char *scope = nullptr; |
72bf9492 | 1124 | |
95554aad TT |
1125 | /* Some data associated with the partial DIE. The tag determines |
1126 | which field is live. */ | |
1127 | union | |
1128 | { | |
1129 | /* The location description associated with this DIE, if any. */ | |
1130 | struct dwarf_block *locdesc; | |
1131 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
9c541725 | 1132 | sect_offset sect_off; |
6f06d47b | 1133 | } d {}; |
72bf9492 DJ |
1134 | |
1135 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
6f06d47b YQ |
1136 | CORE_ADDR lowpc = 0; |
1137 | CORE_ADDR highpc = 0; | |
72bf9492 | 1138 | |
93311388 | 1139 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 1140 | DW_AT_sibling, if any. */ |
48fbe735 YQ |
1141 | /* NOTE: This member isn't strictly necessary, partial_die_info::read |
1142 | could return DW_AT_sibling values to its caller load_partial_dies. */ | |
6f06d47b | 1143 | const gdb_byte *sibling = nullptr; |
72bf9492 DJ |
1144 | |
1145 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
1146 | DW_AT_specification (or DW_AT_abstract_origin or | |
1147 | DW_AT_extension). */ | |
6f06d47b | 1148 | sect_offset spec_offset {}; |
72bf9492 DJ |
1149 | |
1150 | /* Pointers to this DIE's parent, first child, and next sibling, | |
1151 | if any. */ | |
6f06d47b YQ |
1152 | struct partial_die_info *die_parent = nullptr; |
1153 | struct partial_die_info *die_child = nullptr; | |
1154 | struct partial_die_info *die_sibling = nullptr; | |
1155 | ||
1156 | friend struct partial_die_info * | |
1157 | dwarf2_cu::find_partial_die (sect_offset sect_off); | |
1158 | ||
1159 | private: | |
1160 | /* Only need to do look up in dwarf2_cu::find_partial_die. */ | |
1161 | partial_die_info (sect_offset sect_off) | |
1162 | : partial_die_info (sect_off, DW_TAG_padding, 0) | |
1163 | { | |
1164 | } | |
1165 | ||
1166 | partial_die_info (sect_offset sect_off_, enum dwarf_tag tag_, | |
1167 | int has_children_) | |
1168 | : sect_off (sect_off_), tag (tag_), has_children (has_children_) | |
1169 | { | |
1170 | is_external = 0; | |
1171 | is_declaration = 0; | |
1172 | has_type = 0; | |
1173 | has_specification = 0; | |
1174 | has_pc_info = 0; | |
1175 | may_be_inlined = 0; | |
1176 | main_subprogram = 0; | |
1177 | scope_set = 0; | |
1178 | has_byte_size = 0; | |
1179 | has_const_value = 0; | |
1180 | has_template_arguments = 0; | |
1181 | fixup_called = 0; | |
1182 | is_dwz = 0; | |
1183 | spec_is_dwz = 0; | |
1184 | } | |
c906108c SS |
1185 | }; |
1186 | ||
0963b4bd | 1187 | /* This data structure holds the information of an abbrev. */ |
c906108c SS |
1188 | struct abbrev_info |
1189 | { | |
1190 | unsigned int number; /* number identifying abbrev */ | |
1191 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
1192 | unsigned short has_children; /* boolean */ |
1193 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
1194 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
1195 | struct abbrev_info *next; /* next in chain */ | |
1196 | }; | |
1197 | ||
1198 | struct attr_abbrev | |
1199 | { | |
9d25dd43 DE |
1200 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
1201 | ENUM_BITFIELD(dwarf_form) form : 16; | |
43988095 JK |
1202 | |
1203 | /* It is valid only if FORM is DW_FORM_implicit_const. */ | |
1204 | LONGEST implicit_const; | |
c906108c SS |
1205 | }; |
1206 | ||
433df2d4 DE |
1207 | /* Size of abbrev_table.abbrev_hash_table. */ |
1208 | #define ABBREV_HASH_SIZE 121 | |
1209 | ||
1210 | /* Top level data structure to contain an abbreviation table. */ | |
1211 | ||
1212 | struct abbrev_table | |
1213 | { | |
685af9cd TT |
1214 | explicit abbrev_table (sect_offset off) |
1215 | : sect_off (off) | |
1216 | { | |
4a17f768 | 1217 | m_abbrevs = |
685af9cd | 1218 | XOBNEWVEC (&abbrev_obstack, struct abbrev_info *, ABBREV_HASH_SIZE); |
4a17f768 | 1219 | memset (m_abbrevs, 0, ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); |
685af9cd TT |
1220 | } |
1221 | ||
1222 | DISABLE_COPY_AND_ASSIGN (abbrev_table); | |
1223 | ||
1224 | /* Allocate space for a struct abbrev_info object in | |
1225 | ABBREV_TABLE. */ | |
1226 | struct abbrev_info *alloc_abbrev (); | |
1227 | ||
1228 | /* Add an abbreviation to the table. */ | |
1229 | void add_abbrev (unsigned int abbrev_number, struct abbrev_info *abbrev); | |
1230 | ||
1231 | /* Look up an abbrev in the table. | |
1232 | Returns NULL if the abbrev is not found. */ | |
1233 | ||
1234 | struct abbrev_info *lookup_abbrev (unsigned int abbrev_number); | |
1235 | ||
1236 | ||
f4dc4d17 DE |
1237 | /* Where the abbrev table came from. |
1238 | This is used as a sanity check when the table is used. */ | |
685af9cd | 1239 | const sect_offset sect_off; |
433df2d4 DE |
1240 | |
1241 | /* Storage for the abbrev table. */ | |
685af9cd | 1242 | auto_obstack abbrev_obstack; |
433df2d4 | 1243 | |
4a17f768 YQ |
1244 | private: |
1245 | ||
433df2d4 DE |
1246 | /* Hash table of abbrevs. |
1247 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. | |
1248 | It could be statically allocated, but the previous code didn't so we | |
1249 | don't either. */ | |
4a17f768 | 1250 | struct abbrev_info **m_abbrevs; |
433df2d4 DE |
1251 | }; |
1252 | ||
685af9cd TT |
1253 | typedef std::unique_ptr<struct abbrev_table> abbrev_table_up; |
1254 | ||
0963b4bd | 1255 | /* Attributes have a name and a value. */ |
b60c80d6 DJ |
1256 | struct attribute |
1257 | { | |
9d25dd43 | 1258 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
8285870a JK |
1259 | ENUM_BITFIELD(dwarf_form) form : 15; |
1260 | ||
1261 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This | |
1262 | field should be in u.str (existing only for DW_STRING) but it is kept | |
1263 | here for better struct attribute alignment. */ | |
1264 | unsigned int string_is_canonical : 1; | |
1265 | ||
b60c80d6 DJ |
1266 | union |
1267 | { | |
15d034d0 | 1268 | const char *str; |
b60c80d6 | 1269 | struct dwarf_block *blk; |
43bbcdc2 PH |
1270 | ULONGEST unsnd; |
1271 | LONGEST snd; | |
b60c80d6 | 1272 | CORE_ADDR addr; |
ac9ec31b | 1273 | ULONGEST signature; |
b60c80d6 DJ |
1274 | } |
1275 | u; | |
1276 | }; | |
1277 | ||
0963b4bd | 1278 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1279 | struct die_info |
1280 | { | |
76815b17 DE |
1281 | /* DWARF-2 tag for this DIE. */ |
1282 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1283 | ||
1284 | /* Number of attributes */ | |
98bfdba5 PA |
1285 | unsigned char num_attrs; |
1286 | ||
1287 | /* True if we're presently building the full type name for the | |
1288 | type derived from this DIE. */ | |
1289 | unsigned char building_fullname : 1; | |
76815b17 | 1290 | |
adde2bff DE |
1291 | /* True if this die is in process. PR 16581. */ |
1292 | unsigned char in_process : 1; | |
1293 | ||
76815b17 DE |
1294 | /* Abbrev number */ |
1295 | unsigned int abbrev; | |
1296 | ||
93311388 | 1297 | /* Offset in .debug_info or .debug_types section. */ |
9c541725 | 1298 | sect_offset sect_off; |
78ba4af6 JB |
1299 | |
1300 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1301 | points to this die's parent; CHILD points to the first child of | |
1302 | this node; and all the children of a given node are chained | |
4950bc1c | 1303 | together via their SIBLING fields. */ |
639d11d3 DC |
1304 | struct die_info *child; /* Its first child, if any. */ |
1305 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1306 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1307 | |
b60c80d6 DJ |
1308 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1309 | zero, but it's not common and zero-sized arrays are not | |
1310 | sufficiently portable C. */ | |
1311 | struct attribute attrs[1]; | |
c906108c SS |
1312 | }; |
1313 | ||
0963b4bd | 1314 | /* Get at parts of an attribute structure. */ |
c906108c SS |
1315 | |
1316 | #define DW_STRING(attr) ((attr)->u.str) | |
8285870a | 1317 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
c906108c SS |
1318 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
1319 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
1320 | #define DW_SND(attr) ((attr)->u.snd) | |
1321 | #define DW_ADDR(attr) ((attr)->u.addr) | |
ac9ec31b | 1322 | #define DW_SIGNATURE(attr) ((attr)->u.signature) |
c906108c | 1323 | |
0963b4bd | 1324 | /* Blocks are a bunch of untyped bytes. */ |
c906108c SS |
1325 | struct dwarf_block |
1326 | { | |
56eb65bd | 1327 | size_t size; |
1d6edc3c JK |
1328 | |
1329 | /* Valid only if SIZE is not zero. */ | |
d521ce57 | 1330 | const gdb_byte *data; |
c906108c SS |
1331 | }; |
1332 | ||
c906108c SS |
1333 | #ifndef ATTR_ALLOC_CHUNK |
1334 | #define ATTR_ALLOC_CHUNK 4 | |
1335 | #endif | |
1336 | ||
c906108c SS |
1337 | /* Allocate fields for structs, unions and enums in this size. */ |
1338 | #ifndef DW_FIELD_ALLOC_CHUNK | |
1339 | #define DW_FIELD_ALLOC_CHUNK 4 | |
1340 | #endif | |
1341 | ||
c906108c SS |
1342 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1343 | but this would require a corresponding change in unpack_field_as_long | |
1344 | and friends. */ | |
1345 | static int bits_per_byte = 8; | |
1346 | ||
2ddeaf8a TT |
1347 | /* When reading a variant or variant part, we track a bit more |
1348 | information about the field, and store it in an object of this | |
1349 | type. */ | |
1350 | ||
1351 | struct variant_field | |
1352 | { | |
1353 | /* If we see a DW_TAG_variant, then this will be the discriminant | |
1354 | value. */ | |
1355 | ULONGEST discriminant_value; | |
1356 | /* If we see a DW_TAG_variant, then this will be set if this is the | |
1357 | default branch. */ | |
1358 | bool default_branch; | |
1359 | /* While reading a DW_TAG_variant_part, this will be set if this | |
1360 | field is the discriminant. */ | |
1361 | bool is_discriminant; | |
1362 | }; | |
1363 | ||
52059ffd TT |
1364 | struct nextfield |
1365 | { | |
be2daae6 TT |
1366 | int accessibility = 0; |
1367 | int virtuality = 0; | |
2ddeaf8a | 1368 | /* Extra information to describe a variant or variant part. */ |
be2daae6 TT |
1369 | struct variant_field variant {}; |
1370 | struct field field {}; | |
52059ffd TT |
1371 | }; |
1372 | ||
1373 | struct fnfieldlist | |
1374 | { | |
be2daae6 TT |
1375 | const char *name = nullptr; |
1376 | std::vector<struct fn_field> fnfields; | |
52059ffd TT |
1377 | }; |
1378 | ||
c906108c SS |
1379 | /* The routines that read and process dies for a C struct or C++ class |
1380 | pass lists of data member fields and lists of member function fields | |
1381 | in an instance of a field_info structure, as defined below. */ | |
1382 | struct field_info | |
c5aa993b | 1383 | { |
0963b4bd | 1384 | /* List of data member and baseclasses fields. */ |
be2daae6 TT |
1385 | std::vector<struct nextfield> fields; |
1386 | std::vector<struct nextfield> baseclasses; | |
c906108c | 1387 | |
7d0ccb61 | 1388 | /* Number of fields (including baseclasses). */ |
be2daae6 | 1389 | int nfields = 0; |
c906108c | 1390 | |
c5aa993b | 1391 | /* Set if the accesibility of one of the fields is not public. */ |
be2daae6 | 1392 | int non_public_fields = 0; |
c906108c | 1393 | |
c5aa993b JM |
1394 | /* Member function fieldlist array, contains name of possibly overloaded |
1395 | member function, number of overloaded member functions and a pointer | |
1396 | to the head of the member function field chain. */ | |
be2daae6 | 1397 | std::vector<struct fnfieldlist> fnfieldlists; |
98751a41 JK |
1398 | |
1399 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1400 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
be2daae6 | 1401 | std::vector<struct decl_field> typedef_field_list; |
883fd55a KS |
1402 | |
1403 | /* Nested types defined by this class and the number of elements in this | |
1404 | list. */ | |
be2daae6 | 1405 | std::vector<struct decl_field> nested_types_list; |
c5aa993b | 1406 | }; |
c906108c | 1407 | |
10b3939b DJ |
1408 | /* One item on the queue of compilation units to read in full symbols |
1409 | for. */ | |
1410 | struct dwarf2_queue_item | |
1411 | { | |
1412 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 1413 | enum language pretend_language; |
10b3939b DJ |
1414 | struct dwarf2_queue_item *next; |
1415 | }; | |
1416 | ||
1417 | /* The current queue. */ | |
1418 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
1419 | ||
ae038cb0 DJ |
1420 | /* Loaded secondary compilation units are kept in memory until they |
1421 | have not been referenced for the processing of this many | |
1422 | compilation units. Set this to zero to disable caching. Cache | |
1423 | sizes of up to at least twenty will improve startup time for | |
1424 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
b4f54984 | 1425 | static int dwarf_max_cache_age = 5; |
920d2a44 | 1426 | static void |
b4f54984 DE |
1427 | show_dwarf_max_cache_age (struct ui_file *file, int from_tty, |
1428 | struct cmd_list_element *c, const char *value) | |
920d2a44 | 1429 | { |
3e43a32a | 1430 | fprintf_filtered (file, _("The upper bound on the age of cached " |
b4f54984 | 1431 | "DWARF compilation units is %s.\n"), |
920d2a44 AC |
1432 | value); |
1433 | } | |
4390d890 | 1434 | \f |
c906108c SS |
1435 | /* local function prototypes */ |
1436 | ||
a32a8923 DE |
1437 | static const char *get_section_name (const struct dwarf2_section_info *); |
1438 | ||
1439 | static const char *get_section_file_name (const struct dwarf2_section_info *); | |
1440 | ||
918dd910 JK |
1441 | static void dwarf2_find_base_address (struct die_info *die, |
1442 | struct dwarf2_cu *cu); | |
1443 | ||
0018ea6f DE |
1444 | static struct partial_symtab *create_partial_symtab |
1445 | (struct dwarf2_per_cu_data *per_cu, const char *name); | |
1446 | ||
f1902523 JK |
1447 | static void build_type_psymtabs_reader (const struct die_reader_specs *reader, |
1448 | const gdb_byte *info_ptr, | |
1449 | struct die_info *type_unit_die, | |
1450 | int has_children, void *data); | |
1451 | ||
ed2dc618 SM |
1452 | static void dwarf2_build_psymtabs_hard |
1453 | (struct dwarf2_per_objfile *dwarf2_per_objfile); | |
c906108c | 1454 | |
72bf9492 DJ |
1455 | static void scan_partial_symbols (struct partial_die_info *, |
1456 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1457 | int, struct dwarf2_cu *); |
c906108c | 1458 | |
72bf9492 DJ |
1459 | static void add_partial_symbol (struct partial_die_info *, |
1460 | struct dwarf2_cu *); | |
63d06c5c | 1461 | |
72bf9492 DJ |
1462 | static void add_partial_namespace (struct partial_die_info *pdi, |
1463 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 1464 | int set_addrmap, struct dwarf2_cu *cu); |
63d06c5c | 1465 | |
5d7cb8df | 1466 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
cdc07690 | 1467 | CORE_ADDR *highpc, int set_addrmap, |
5d7cb8df JK |
1468 | struct dwarf2_cu *cu); |
1469 | ||
72bf9492 DJ |
1470 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1471 | struct dwarf2_cu *cu); | |
91c24f0a | 1472 | |
bc30ff58 JB |
1473 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1474 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1475 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1476 | |
257e7a09 YQ |
1477 | static void dwarf2_read_symtab (struct partial_symtab *, |
1478 | struct objfile *); | |
c906108c | 1479 | |
a14ed312 | 1480 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 1481 | |
685af9cd | 1482 | static abbrev_table_up abbrev_table_read_table |
ed2dc618 SM |
1483 | (struct dwarf2_per_objfile *dwarf2_per_objfile, struct dwarf2_section_info *, |
1484 | sect_offset); | |
433df2d4 | 1485 | |
d521ce57 | 1486 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1487 | |
dee91e82 | 1488 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1489 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1490 | |
fb816e8b TV |
1491 | /* A pair of partial_die_info and compilation unit. */ |
1492 | struct cu_partial_die_info | |
1493 | { | |
1494 | /* The compilation unit of the partial_die_info. */ | |
1495 | struct dwarf2_cu *cu; | |
1496 | /* A partial_die_info. */ | |
1497 | struct partial_die_info *pdi; | |
122cf0f2 AB |
1498 | |
1499 | cu_partial_die_info (struct dwarf2_cu *cu, struct partial_die_info *pdi) | |
1500 | : cu (cu), | |
1501 | pdi (pdi) | |
1502 | { /* Nothhing. */ } | |
1503 | ||
1504 | private: | |
1505 | cu_partial_die_info () = delete; | |
fb816e8b TV |
1506 | }; |
1507 | ||
122cf0f2 AB |
1508 | static const struct cu_partial_die_info find_partial_die (sect_offset, int, |
1509 | struct dwarf2_cu *); | |
72bf9492 | 1510 | |
d521ce57 TT |
1511 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1512 | struct attribute *, struct attr_abbrev *, | |
1513 | const gdb_byte *); | |
a8329558 | 1514 | |
a1855c1d | 1515 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
c906108c | 1516 | |
a1855c1d | 1517 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
c906108c | 1518 | |
a1855c1d | 1519 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
c906108c | 1520 | |
15f18d14 AT |
1521 | /* Read the next three bytes (little-endian order) as an unsigned integer. */ |
1522 | static unsigned int read_3_bytes (bfd *, const gdb_byte *); | |
1523 | ||
a1855c1d | 1524 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
c906108c | 1525 | |
a1855c1d | 1526 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
c906108c | 1527 | |
d521ce57 | 1528 | static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 1529 | unsigned int *); |
c906108c | 1530 | |
d521ce57 | 1531 | static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *); |
c764a876 DE |
1532 | |
1533 | static LONGEST read_checked_initial_length_and_offset | |
d521ce57 | 1534 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1535 | unsigned int *, unsigned int *); |
613e1657 | 1536 | |
d521ce57 TT |
1537 | static LONGEST read_offset (bfd *, const gdb_byte *, |
1538 | const struct comp_unit_head *, | |
c764a876 DE |
1539 | unsigned int *); |
1540 | ||
d521ce57 | 1541 | static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int); |
613e1657 | 1542 | |
ed2dc618 SM |
1543 | static sect_offset read_abbrev_offset |
1544 | (struct dwarf2_per_objfile *dwarf2_per_objfile, | |
1545 | struct dwarf2_section_info *, sect_offset); | |
f4dc4d17 | 1546 | |
d521ce57 | 1547 | static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int); |
c906108c | 1548 | |
d521ce57 | 1549 | static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1550 | |
ed2dc618 SM |
1551 | static const char *read_indirect_string |
1552 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *, const gdb_byte *, | |
1553 | const struct comp_unit_head *, unsigned int *); | |
4bdf3d34 | 1554 | |
ed2dc618 SM |
1555 | static const char *read_indirect_line_string |
1556 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *, const gdb_byte *, | |
1557 | const struct comp_unit_head *, unsigned int *); | |
36586728 | 1558 | |
ed2dc618 SM |
1559 | static const char *read_indirect_string_at_offset |
1560 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *abfd, | |
1561 | LONGEST str_offset); | |
927aa2e7 | 1562 | |
ed2dc618 SM |
1563 | static const char *read_indirect_string_from_dwz |
1564 | (struct objfile *objfile, struct dwz_file *, LONGEST); | |
c906108c | 1565 | |
d521ce57 | 1566 | static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1567 | |
d521ce57 TT |
1568 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1569 | const gdb_byte *, | |
3019eac3 DE |
1570 | unsigned int *); |
1571 | ||
d521ce57 | 1572 | static const char *read_str_index (const struct die_reader_specs *reader, |
342587c4 | 1573 | ULONGEST str_index); |
3019eac3 | 1574 | |
e142c38c | 1575 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1576 | |
e142c38c DJ |
1577 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1578 | struct dwarf2_cu *); | |
c906108c | 1579 | |
348e048f | 1580 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1581 | unsigned int); |
348e048f | 1582 | |
7d45c7c3 KB |
1583 | static const char *dwarf2_string_attr (struct die_info *die, unsigned int name, |
1584 | struct dwarf2_cu *cu); | |
1585 | ||
a084a2a6 AT |
1586 | static const char *dwarf2_dwo_name (struct die_info *die, struct dwarf2_cu *cu); |
1587 | ||
05cf31d1 JB |
1588 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1589 | struct dwarf2_cu *cu); | |
1590 | ||
e142c38c | 1591 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1592 | |
e142c38c | 1593 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1594 | struct dwarf2_cu **); |
63d06c5c | 1595 | |
9c541725 | 1596 | static line_header_up dwarf_decode_line_header (sect_offset sect_off, |
fff8551c | 1597 | struct dwarf2_cu *cu); |
debd256d | 1598 | |
f3f5162e | 1599 | static void dwarf_decode_lines (struct line_header *, const char *, |
c3b7b696 | 1600 | struct dwarf2_cu *, struct partial_symtab *, |
527f3840 | 1601 | CORE_ADDR, int decode_mapping); |
c906108c | 1602 | |
804d2729 TT |
1603 | static void dwarf2_start_subfile (struct dwarf2_cu *, const char *, |
1604 | const char *); | |
c906108c | 1605 | |
a14ed312 | 1606 | static struct symbol *new_symbol (struct die_info *, struct type *, |
5e2db402 | 1607 | struct dwarf2_cu *, struct symbol * = NULL); |
34eaf542 | 1608 | |
ff39bb5e | 1609 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1610 | struct dwarf2_cu *); |
c906108c | 1611 | |
ff39bb5e | 1612 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1613 | struct type *type, |
1614 | const char *name, | |
1615 | struct obstack *obstack, | |
12df843f | 1616 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1617 | const gdb_byte **bytes, |
98bfdba5 | 1618 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1619 | |
e7c27a73 | 1620 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1621 | |
b4ba55a1 JB |
1622 | static int need_gnat_info (struct dwarf2_cu *); |
1623 | ||
3e43a32a MS |
1624 | static struct type *die_descriptive_type (struct die_info *, |
1625 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1626 | |
1627 | static void set_descriptive_type (struct type *, struct die_info *, | |
1628 | struct dwarf2_cu *); | |
1629 | ||
e7c27a73 DJ |
1630 | static struct type *die_containing_type (struct die_info *, |
1631 | struct dwarf2_cu *); | |
c906108c | 1632 | |
ff39bb5e | 1633 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1634 | struct dwarf2_cu *); |
c906108c | 1635 | |
f792889a | 1636 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1637 | |
673bfd45 DE |
1638 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1639 | ||
0d5cff50 | 1640 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1641 | |
6e70227d | 1642 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1643 | const char *suffix, int physname, |
1644 | struct dwarf2_cu *cu); | |
63d06c5c | 1645 | |
e7c27a73 | 1646 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1647 | |
348e048f DE |
1648 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1649 | ||
e7c27a73 | 1650 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1651 | |
e7c27a73 | 1652 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1653 | |
96408a79 SA |
1654 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1655 | ||
71a3c369 TT |
1656 | static void read_variable (struct die_info *die, struct dwarf2_cu *cu); |
1657 | ||
ff013f42 JK |
1658 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
1659 | struct dwarf2_cu *, struct partial_symtab *); | |
1660 | ||
3a2b436a | 1661 | /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return |
e385593e | 1662 | values. Keep the items ordered with increasing constraints compliance. */ |
3a2b436a JK |
1663 | enum pc_bounds_kind |
1664 | { | |
e385593e | 1665 | /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */ |
3a2b436a JK |
1666 | PC_BOUNDS_NOT_PRESENT, |
1667 | ||
e385593e JK |
1668 | /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges |
1669 | were present but they do not form a valid range of PC addresses. */ | |
1670 | PC_BOUNDS_INVALID, | |
1671 | ||
3a2b436a JK |
1672 | /* Discontiguous range was found - that is DW_AT_ranges was found. */ |
1673 | PC_BOUNDS_RANGES, | |
1674 | ||
1675 | /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */ | |
1676 | PC_BOUNDS_HIGH_LOW, | |
1677 | }; | |
1678 | ||
1679 | static enum pc_bounds_kind dwarf2_get_pc_bounds (struct die_info *, | |
1680 | CORE_ADDR *, CORE_ADDR *, | |
1681 | struct dwarf2_cu *, | |
1682 | struct partial_symtab *); | |
c906108c | 1683 | |
fae299cd DC |
1684 | static void get_scope_pc_bounds (struct die_info *, |
1685 | CORE_ADDR *, CORE_ADDR *, | |
1686 | struct dwarf2_cu *); | |
1687 | ||
801e3a5b JB |
1688 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1689 | CORE_ADDR, struct dwarf2_cu *); | |
1690 | ||
a14ed312 | 1691 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1692 | struct dwarf2_cu *); |
c906108c | 1693 | |
a14ed312 | 1694 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1695 | struct type *, struct dwarf2_cu *); |
c906108c | 1696 | |
a14ed312 | 1697 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1698 | struct die_info *, struct type *, |
e7c27a73 | 1699 | struct dwarf2_cu *); |
c906108c | 1700 | |
a14ed312 | 1701 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1702 | struct type *, |
1703 | struct dwarf2_cu *); | |
c906108c | 1704 | |
134d01f1 | 1705 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1706 | |
e7c27a73 | 1707 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1708 | |
e7c27a73 | 1709 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1710 | |
5d7cb8df JK |
1711 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1712 | ||
804d2729 | 1713 | static struct using_direct **using_directives (struct dwarf2_cu *cu); |
22cee43f | 1714 | |
27aa8d6a SW |
1715 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1716 | ||
74921315 KS |
1717 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1718 | ||
f55ee35c JK |
1719 | static struct type *read_module_type (struct die_info *die, |
1720 | struct dwarf2_cu *cu); | |
1721 | ||
38d518c9 | 1722 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1723 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1724 | |
134d01f1 | 1725 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1726 | |
e7c27a73 | 1727 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1728 | |
6e70227d | 1729 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1730 | struct dwarf2_cu *); |
1731 | ||
bf6af496 | 1732 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1733 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1734 | struct die_info *); |
639d11d3 | 1735 | |
dee91e82 | 1736 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1737 | const gdb_byte *info_ptr, |
1738 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1739 | struct die_info *parent); |
1740 | ||
d521ce57 TT |
1741 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1742 | struct die_info **, const gdb_byte *, | |
1743 | int *, int); | |
3019eac3 | 1744 | |
d521ce57 TT |
1745 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
1746 | struct die_info **, const gdb_byte *, | |
1747 | int *); | |
93311388 | 1748 | |
e7c27a73 | 1749 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1750 | |
15d034d0 TT |
1751 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
1752 | struct obstack *); | |
71c25dea | 1753 | |
15d034d0 | 1754 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1755 | |
15d034d0 | 1756 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1757 | struct die_info *die, |
1758 | struct dwarf2_cu *cu); | |
1759 | ||
ca69b9e6 DE |
1760 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1761 | struct dwarf2_cu *cu); | |
1762 | ||
e142c38c | 1763 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1764 | struct dwarf2_cu **); |
9219021c | 1765 | |
f39c6ffd | 1766 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1767 | |
f39c6ffd | 1768 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1769 | |
a084a2a6 AT |
1770 | static const char *dwarf_unit_type_name (int unit_type); |
1771 | ||
f39c6ffd | 1772 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1773 | |
a121b7c1 | 1774 | static const char *dwarf_bool_name (unsigned int); |
c906108c | 1775 | |
f39c6ffd | 1776 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1777 | |
f9aca02d | 1778 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1779 | |
d97bc12b DE |
1780 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1781 | ||
1782 | static void dump_die_for_error (struct die_info *); | |
1783 | ||
1784 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1785 | struct die_info *); | |
c906108c | 1786 | |
d97bc12b | 1787 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1788 | |
51545339 | 1789 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1790 | struct dwarf2_cu *); |
c906108c | 1791 | |
ff39bb5e | 1792 | static sect_offset dwarf2_get_ref_die_offset (const struct attribute *); |
c906108c | 1793 | |
ff39bb5e | 1794 | static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int); |
a02abb62 | 1795 | |
348e048f | 1796 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 1797 | const struct attribute *, |
348e048f DE |
1798 | struct dwarf2_cu **); |
1799 | ||
10b3939b | 1800 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 1801 | const struct attribute *, |
f2f0e013 | 1802 | struct dwarf2_cu **); |
c906108c | 1803 | |
348e048f | 1804 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 1805 | const struct attribute *, |
348e048f DE |
1806 | struct dwarf2_cu **); |
1807 | ||
ac9ec31b DE |
1808 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1809 | struct dwarf2_cu *); | |
1810 | ||
1811 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 1812 | const struct attribute *, |
ac9ec31b DE |
1813 | struct dwarf2_cu *); |
1814 | ||
e5fe5e75 | 1815 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1816 | |
52dc124a | 1817 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1818 | |
63e43d3a PMR |
1819 | static int attr_to_dynamic_prop (const struct attribute *attr, |
1820 | struct die_info *die, struct dwarf2_cu *cu, | |
9a49df9d | 1821 | struct dynamic_prop *prop, struct type *type); |
63e43d3a | 1822 | |
c906108c SS |
1823 | /* memory allocation interface */ |
1824 | ||
7b5a2f43 | 1825 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1826 | |
b60c80d6 | 1827 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1828 | |
43f3e411 | 1829 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, int); |
2e276125 | 1830 | |
6e5a29e1 | 1831 | static int attr_form_is_block (const struct attribute *); |
8e19ed76 | 1832 | |
6e5a29e1 | 1833 | static int attr_form_is_section_offset (const struct attribute *); |
3690dd37 | 1834 | |
6e5a29e1 | 1835 | static int attr_form_is_constant (const struct attribute *); |
3690dd37 | 1836 | |
6e5a29e1 | 1837 | static int attr_form_is_ref (const struct attribute *); |
7771576e | 1838 | |
8cf6f0b1 TT |
1839 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1840 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 1841 | const struct attribute *attr); |
8cf6f0b1 | 1842 | |
ff39bb5e | 1843 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 1844 | struct symbol *sym, |
f1e6e072 TT |
1845 | struct dwarf2_cu *cu, |
1846 | int is_block); | |
4c2df51b | 1847 | |
d521ce57 TT |
1848 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1849 | const gdb_byte *info_ptr, | |
1850 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 1851 | |
72bf9492 DJ |
1852 | static hashval_t partial_die_hash (const void *item); |
1853 | ||
1854 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1855 | ||
ae038cb0 | 1856 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
ed2dc618 SM |
1857 | (sect_offset sect_off, unsigned int offset_in_dwz, |
1858 | struct dwarf2_per_objfile *dwarf2_per_objfile); | |
ae038cb0 | 1859 | |
9816fde3 | 1860 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, |
95554aad TT |
1861 | struct die_info *comp_unit_die, |
1862 | enum language pretend_language); | |
93311388 | 1863 | |
ed2dc618 | 1864 | static void age_cached_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
ae038cb0 | 1865 | |
dee91e82 | 1866 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 1867 | |
f792889a DJ |
1868 | static struct type *set_die_type (struct die_info *, struct type *, |
1869 | struct dwarf2_cu *); | |
1c379e20 | 1870 | |
ed2dc618 | 1871 | static void create_all_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
ae038cb0 | 1872 | |
ed2dc618 | 1873 | static int create_all_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
1fd400ff | 1874 | |
58f0c718 | 1875 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, bool, |
95554aad | 1876 | enum language); |
10b3939b | 1877 | |
95554aad TT |
1878 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
1879 | enum language); | |
10b3939b | 1880 | |
f4dc4d17 DE |
1881 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
1882 | enum language); | |
1883 | ||
10b3939b DJ |
1884 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
1885 | struct dwarf2_per_cu_data *); | |
1886 | ||
ae038cb0 DJ |
1887 | static void dwarf2_mark (struct dwarf2_cu *); |
1888 | ||
1889 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
1890 | ||
b64f50a1 | 1891 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 1892 | struct dwarf2_per_cu_data *); |
673bfd45 | 1893 | |
f792889a | 1894 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1895 | |
95554aad TT |
1896 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
1897 | enum language pretend_language); | |
1898 | ||
ed2dc618 | 1899 | static void process_queue (struct dwarf2_per_objfile *dwarf2_per_objfile); |
9291a0cd | 1900 | |
9a49df9d AB |
1901 | static struct type *dwarf2_per_cu_addr_type (struct dwarf2_per_cu_data *per_cu); |
1902 | static struct type *dwarf2_per_cu_addr_sized_int_type | |
1903 | (struct dwarf2_per_cu_data *per_cu, bool unsigned_p); | |
1904 | ||
b303c6f6 AB |
1905 | /* Class, the destructor of which frees all allocated queue entries. This |
1906 | will only have work to do if an error was thrown while processing the | |
1907 | dwarf. If no error was thrown then the queue entries should have all | |
1908 | been processed, and freed, as we went along. */ | |
1909 | ||
1910 | class dwarf2_queue_guard | |
1911 | { | |
1912 | public: | |
1913 | dwarf2_queue_guard () = default; | |
1914 | ||
1915 | /* Free any entries remaining on the queue. There should only be | |
1916 | entries left if we hit an error while processing the dwarf. */ | |
1917 | ~dwarf2_queue_guard () | |
1918 | { | |
1919 | struct dwarf2_queue_item *item, *last; | |
1920 | ||
1921 | item = dwarf2_queue; | |
1922 | while (item) | |
1923 | { | |
1924 | /* Anything still marked queued is likely to be in an | |
1925 | inconsistent state, so discard it. */ | |
1926 | if (item->per_cu->queued) | |
1927 | { | |
1928 | if (item->per_cu->cu != NULL) | |
1929 | free_one_cached_comp_unit (item->per_cu); | |
1930 | item->per_cu->queued = 0; | |
1931 | } | |
1932 | ||
1933 | last = item; | |
1934 | item = item->next; | |
1935 | xfree (last); | |
1936 | } | |
1937 | ||
1938 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
1939 | } | |
1940 | }; | |
1941 | ||
d721ba37 PA |
1942 | /* The return type of find_file_and_directory. Note, the enclosed |
1943 | string pointers are only valid while this object is valid. */ | |
1944 | ||
1945 | struct file_and_directory | |
1946 | { | |
1947 | /* The filename. This is never NULL. */ | |
1948 | const char *name; | |
1949 | ||
1950 | /* The compilation directory. NULL if not known. If we needed to | |
1951 | compute a new string, this points to COMP_DIR_STORAGE, otherwise, | |
1952 | points directly to the DW_AT_comp_dir string attribute owned by | |
1953 | the obstack that owns the DIE. */ | |
1954 | const char *comp_dir; | |
1955 | ||
1956 | /* If we needed to build a new string for comp_dir, this is what | |
1957 | owns the storage. */ | |
1958 | std::string comp_dir_storage; | |
1959 | }; | |
1960 | ||
1961 | static file_and_directory find_file_and_directory (struct die_info *die, | |
1962 | struct dwarf2_cu *cu); | |
9291a0cd TT |
1963 | |
1964 | static char *file_full_name (int file, struct line_header *lh, | |
1965 | const char *comp_dir); | |
1966 | ||
43988095 JK |
1967 | /* Expected enum dwarf_unit_type for read_comp_unit_head. */ |
1968 | enum class rcuh_kind { COMPILE, TYPE }; | |
1969 | ||
d521ce57 | 1970 | static const gdb_byte *read_and_check_comp_unit_head |
ed2dc618 SM |
1971 | (struct dwarf2_per_objfile* dwarf2_per_objfile, |
1972 | struct comp_unit_head *header, | |
36586728 | 1973 | struct dwarf2_section_info *section, |
d521ce57 | 1974 | struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr, |
43988095 | 1975 | rcuh_kind section_kind); |
36586728 | 1976 | |
fd820528 | 1977 | static void init_cutu_and_read_dies |
f4dc4d17 | 1978 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
58f0c718 | 1979 | int use_existing_cu, int keep, bool skip_partial, |
3019eac3 DE |
1980 | die_reader_func_ftype *die_reader_func, void *data); |
1981 | ||
dee91e82 DE |
1982 | static void init_cutu_and_read_dies_simple |
1983 | (struct dwarf2_per_cu_data *this_cu, | |
1984 | die_reader_func_ftype *die_reader_func, void *data); | |
9291a0cd | 1985 | |
673bfd45 | 1986 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
1fd400ff | 1987 | |
3019eac3 DE |
1988 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
1989 | ||
57d63ce2 | 1990 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
ed2dc618 SM |
1991 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
1992 | struct dwp_file *dwp_file, const char *comp_dir, | |
57d63ce2 | 1993 | ULONGEST signature, int is_debug_types); |
a2ce51a0 | 1994 | |
ed2dc618 SM |
1995 | static struct dwp_file *get_dwp_file |
1996 | (struct dwarf2_per_objfile *dwarf2_per_objfile); | |
a2ce51a0 | 1997 | |
3019eac3 | 1998 | static struct dwo_unit *lookup_dwo_comp_unit |
a1855c1d | 1999 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
2000 | |
2001 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 2002 | (struct signatured_type *, const char *, const char *); |
3019eac3 | 2003 | |
89e63ee4 DE |
2004 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
2005 | ||
263db9a1 TT |
2006 | /* A unique pointer to a dwo_file. */ |
2007 | ||
51ac9db5 | 2008 | typedef std::unique_ptr<struct dwo_file> dwo_file_up; |
263db9a1 | 2009 | |
ed2dc618 | 2010 | static void process_cu_includes (struct dwarf2_per_objfile *dwarf2_per_objfile); |
95554aad | 2011 | |
1b80a9fa | 2012 | static void check_producer (struct dwarf2_cu *cu); |
527f3840 JK |
2013 | |
2014 | static void free_line_header_voidp (void *arg); | |
4390d890 DE |
2015 | \f |
2016 | /* Various complaints about symbol reading that don't abort the process. */ | |
2017 | ||
2018 | static void | |
2019 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
2020 | { | |
b98664d3 | 2021 | complaint (_("statement list doesn't fit in .debug_line section")); |
4390d890 DE |
2022 | } |
2023 | ||
2024 | static void | |
2025 | dwarf2_debug_line_missing_file_complaint (void) | |
2026 | { | |
b98664d3 | 2027 | complaint (_(".debug_line section has line data without a file")); |
4390d890 DE |
2028 | } |
2029 | ||
2030 | static void | |
2031 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
2032 | { | |
b98664d3 | 2033 | complaint (_(".debug_line section has line " |
4390d890 DE |
2034 | "program sequence without an end")); |
2035 | } | |
2036 | ||
2037 | static void | |
2038 | dwarf2_complex_location_expr_complaint (void) | |
2039 | { | |
b98664d3 | 2040 | complaint (_("location expression too complex")); |
4390d890 DE |
2041 | } |
2042 | ||
2043 | static void | |
2044 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
2045 | int arg3) | |
2046 | { | |
b98664d3 | 2047 | complaint (_("const value length mismatch for '%s', got %d, expected %d"), |
4390d890 DE |
2048 | arg1, arg2, arg3); |
2049 | } | |
2050 | ||
2051 | static void | |
2052 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) | |
2053 | { | |
b98664d3 | 2054 | complaint (_("debug info runs off end of %s section" |
4390d890 | 2055 | " [in module %s]"), |
a32a8923 DE |
2056 | get_section_name (section), |
2057 | get_section_file_name (section)); | |
4390d890 | 2058 | } |
1b80a9fa | 2059 | |
4390d890 DE |
2060 | static void |
2061 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
2062 | { | |
b98664d3 | 2063 | complaint (_("macro debug info contains a " |
4390d890 DE |
2064 | "malformed macro definition:\n`%s'"), |
2065 | arg1); | |
2066 | } | |
2067 | ||
2068 | static void | |
2069 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
2070 | { | |
b98664d3 | 2071 | complaint (_("invalid attribute class or form for '%s' in '%s'"), |
4390d890 DE |
2072 | arg1, arg2); |
2073 | } | |
527f3840 JK |
2074 | |
2075 | /* Hash function for line_header_hash. */ | |
2076 | ||
2077 | static hashval_t | |
2078 | line_header_hash (const struct line_header *ofs) | |
2079 | { | |
9c541725 | 2080 | return to_underlying (ofs->sect_off) ^ ofs->offset_in_dwz; |
527f3840 JK |
2081 | } |
2082 | ||
2083 | /* Hash function for htab_create_alloc_ex for line_header_hash. */ | |
2084 | ||
2085 | static hashval_t | |
2086 | line_header_hash_voidp (const void *item) | |
2087 | { | |
9a3c8263 | 2088 | const struct line_header *ofs = (const struct line_header *) item; |
527f3840 JK |
2089 | |
2090 | return line_header_hash (ofs); | |
2091 | } | |
2092 | ||
2093 | /* Equality function for line_header_hash. */ | |
2094 | ||
2095 | static int | |
2096 | line_header_eq_voidp (const void *item_lhs, const void *item_rhs) | |
2097 | { | |
9a3c8263 SM |
2098 | const struct line_header *ofs_lhs = (const struct line_header *) item_lhs; |
2099 | const struct line_header *ofs_rhs = (const struct line_header *) item_rhs; | |
527f3840 | 2100 | |
9c541725 | 2101 | return (ofs_lhs->sect_off == ofs_rhs->sect_off |
527f3840 JK |
2102 | && ofs_lhs->offset_in_dwz == ofs_rhs->offset_in_dwz); |
2103 | } | |
2104 | ||
4390d890 | 2105 | \f |
9291a0cd | 2106 | |
31aa7e4e JB |
2107 | /* Read the given attribute value as an address, taking the attribute's |
2108 | form into account. */ | |
2109 | ||
2110 | static CORE_ADDR | |
2111 | attr_value_as_address (struct attribute *attr) | |
2112 | { | |
2113 | CORE_ADDR addr; | |
2114 | ||
336d760d AT |
2115 | if (attr->form != DW_FORM_addr && attr->form != DW_FORM_addrx |
2116 | && attr->form != DW_FORM_GNU_addr_index) | |
31aa7e4e JB |
2117 | { |
2118 | /* Aside from a few clearly defined exceptions, attributes that | |
2119 | contain an address must always be in DW_FORM_addr form. | |
2120 | Unfortunately, some compilers happen to be violating this | |
2121 | requirement by encoding addresses using other forms, such | |
2122 | as DW_FORM_data4 for example. For those broken compilers, | |
2123 | we try to do our best, without any guarantee of success, | |
2124 | to interpret the address correctly. It would also be nice | |
2125 | to generate a complaint, but that would require us to maintain | |
2126 | a list of legitimate cases where a non-address form is allowed, | |
2127 | as well as update callers to pass in at least the CU's DWARF | |
2128 | version. This is more overhead than what we're willing to | |
2129 | expand for a pretty rare case. */ | |
2130 | addr = DW_UNSND (attr); | |
2131 | } | |
2132 | else | |
2133 | addr = DW_ADDR (attr); | |
2134 | ||
2135 | return addr; | |
2136 | } | |
2137 | ||
330cdd98 PA |
2138 | /* See declaration. */ |
2139 | ||
2140 | dwarf2_per_objfile::dwarf2_per_objfile (struct objfile *objfile_, | |
4b610737 TT |
2141 | const dwarf2_debug_sections *names, |
2142 | bool can_copy_) | |
2143 | : objfile (objfile_), | |
2144 | can_copy (can_copy_) | |
330cdd98 PA |
2145 | { |
2146 | if (names == NULL) | |
2147 | names = &dwarf2_elf_names; | |
2148 | ||
2149 | bfd *obfd = objfile->obfd; | |
2150 | ||
2151 | for (asection *sec = obfd->sections; sec != NULL; sec = sec->next) | |
2152 | locate_sections (obfd, sec, *names); | |
2153 | } | |
2154 | ||
2155 | dwarf2_per_objfile::~dwarf2_per_objfile () | |
2156 | { | |
2157 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
2158 | free_cached_comp_units (); | |
2159 | ||
2160 | if (quick_file_names_table) | |
2161 | htab_delete (quick_file_names_table); | |
2162 | ||
2163 | if (line_header_hash) | |
2164 | htab_delete (line_header_hash); | |
2165 | ||
b76e467d SM |
2166 | for (dwarf2_per_cu_data *per_cu : all_comp_units) |
2167 | VEC_free (dwarf2_per_cu_ptr, per_cu->imported_symtabs); | |
fc8e7e75 | 2168 | |
b2bdb8cf SM |
2169 | for (signatured_type *sig_type : all_type_units) |
2170 | VEC_free (dwarf2_per_cu_ptr, sig_type->per_cu.imported_symtabs); | |
fc8e7e75 | 2171 | |
330cdd98 PA |
2172 | /* Everything else should be on the objfile obstack. */ |
2173 | } | |
2174 | ||
2175 | /* See declaration. */ | |
2176 | ||
2177 | void | |
2178 | dwarf2_per_objfile::free_cached_comp_units () | |
2179 | { | |
2180 | dwarf2_per_cu_data *per_cu = read_in_chain; | |
2181 | dwarf2_per_cu_data **last_chain = &read_in_chain; | |
2182 | while (per_cu != NULL) | |
2183 | { | |
2184 | dwarf2_per_cu_data *next_cu = per_cu->cu->read_in_chain; | |
2185 | ||
fcd3b13d | 2186 | delete per_cu->cu; |
330cdd98 PA |
2187 | *last_chain = next_cu; |
2188 | per_cu = next_cu; | |
2189 | } | |
2190 | } | |
2191 | ||
11ed8cad TT |
2192 | /* A helper class that calls free_cached_comp_units on |
2193 | destruction. */ | |
2194 | ||
2195 | class free_cached_comp_units | |
2196 | { | |
2197 | public: | |
2198 | ||
2199 | explicit free_cached_comp_units (dwarf2_per_objfile *per_objfile) | |
2200 | : m_per_objfile (per_objfile) | |
2201 | { | |
2202 | } | |
2203 | ||
2204 | ~free_cached_comp_units () | |
2205 | { | |
2206 | m_per_objfile->free_cached_comp_units (); | |
2207 | } | |
2208 | ||
2209 | DISABLE_COPY_AND_ASSIGN (free_cached_comp_units); | |
2210 | ||
2211 | private: | |
2212 | ||
2213 | dwarf2_per_objfile *m_per_objfile; | |
2214 | }; | |
2215 | ||
c906108c | 2216 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
2217 | information and return true if we have enough to do something. |
2218 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
4b610737 TT |
2219 | ELF names are used. CAN_COPY is true for formats where symbol |
2220 | interposition is possible and so symbol values must follow copy | |
2221 | relocation rules. */ | |
c906108c SS |
2222 | |
2223 | int | |
251d32d9 | 2224 | dwarf2_has_info (struct objfile *objfile, |
4b610737 TT |
2225 | const struct dwarf2_debug_sections *names, |
2226 | bool can_copy) | |
c906108c | 2227 | { |
97cbe998 SDJ |
2228 | if (objfile->flags & OBJF_READNEVER) |
2229 | return 0; | |
2230 | ||
ed2dc618 SM |
2231 | struct dwarf2_per_objfile *dwarf2_per_objfile |
2232 | = get_dwarf2_per_objfile (objfile); | |
2233 | ||
2234 | if (dwarf2_per_objfile == NULL) | |
5bfd760d | 2235 | dwarf2_per_objfile = dwarf2_objfile_data_key.emplace (objfile, objfile, |
4b610737 TT |
2236 | names, |
2237 | can_copy); | |
5bfd760d | 2238 | |
73869dc2 | 2239 | return (!dwarf2_per_objfile->info.is_virtual |
049412e3 | 2240 | && dwarf2_per_objfile->info.s.section != NULL |
73869dc2 | 2241 | && !dwarf2_per_objfile->abbrev.is_virtual |
049412e3 | 2242 | && dwarf2_per_objfile->abbrev.s.section != NULL); |
73869dc2 DE |
2243 | } |
2244 | ||
2245 | /* Return the containing section of virtual section SECTION. */ | |
2246 | ||
2247 | static struct dwarf2_section_info * | |
2248 | get_containing_section (const struct dwarf2_section_info *section) | |
2249 | { | |
2250 | gdb_assert (section->is_virtual); | |
2251 | return section->s.containing_section; | |
c906108c SS |
2252 | } |
2253 | ||
a32a8923 DE |
2254 | /* Return the bfd owner of SECTION. */ |
2255 | ||
2256 | static struct bfd * | |
2257 | get_section_bfd_owner (const struct dwarf2_section_info *section) | |
2258 | { | |
73869dc2 DE |
2259 | if (section->is_virtual) |
2260 | { | |
2261 | section = get_containing_section (section); | |
2262 | gdb_assert (!section->is_virtual); | |
2263 | } | |
049412e3 | 2264 | return section->s.section->owner; |
a32a8923 DE |
2265 | } |
2266 | ||
2267 | /* Return the bfd section of SECTION. | |
2268 | Returns NULL if the section is not present. */ | |
2269 | ||
2270 | static asection * | |
2271 | get_section_bfd_section (const struct dwarf2_section_info *section) | |
2272 | { | |
73869dc2 DE |
2273 | if (section->is_virtual) |
2274 | { | |
2275 | section = get_containing_section (section); | |
2276 | gdb_assert (!section->is_virtual); | |
2277 | } | |
049412e3 | 2278 | return section->s.section; |
a32a8923 DE |
2279 | } |
2280 | ||
2281 | /* Return the name of SECTION. */ | |
2282 | ||
2283 | static const char * | |
2284 | get_section_name (const struct dwarf2_section_info *section) | |
2285 | { | |
2286 | asection *sectp = get_section_bfd_section (section); | |
2287 | ||
2288 | gdb_assert (sectp != NULL); | |
fd361982 | 2289 | return bfd_section_name (sectp); |
a32a8923 DE |
2290 | } |
2291 | ||
2292 | /* Return the name of the file SECTION is in. */ | |
2293 | ||
2294 | static const char * | |
2295 | get_section_file_name (const struct dwarf2_section_info *section) | |
2296 | { | |
2297 | bfd *abfd = get_section_bfd_owner (section); | |
2298 | ||
2299 | return bfd_get_filename (abfd); | |
2300 | } | |
2301 | ||
2302 | /* Return the id of SECTION. | |
2303 | Returns 0 if SECTION doesn't exist. */ | |
2304 | ||
2305 | static int | |
2306 | get_section_id (const struct dwarf2_section_info *section) | |
2307 | { | |
2308 | asection *sectp = get_section_bfd_section (section); | |
2309 | ||
2310 | if (sectp == NULL) | |
2311 | return 0; | |
2312 | return sectp->id; | |
2313 | } | |
2314 | ||
2315 | /* Return the flags of SECTION. | |
73869dc2 | 2316 | SECTION (or containing section if this is a virtual section) must exist. */ |
a32a8923 DE |
2317 | |
2318 | static int | |
2319 | get_section_flags (const struct dwarf2_section_info *section) | |
2320 | { | |
2321 | asection *sectp = get_section_bfd_section (section); | |
2322 | ||
2323 | gdb_assert (sectp != NULL); | |
fd361982 | 2324 | return bfd_section_flags (sectp); |
a32a8923 DE |
2325 | } |
2326 | ||
251d32d9 TG |
2327 | /* When loading sections, we look either for uncompressed section or for |
2328 | compressed section names. */ | |
233a11ab CS |
2329 | |
2330 | static int | |
251d32d9 TG |
2331 | section_is_p (const char *section_name, |
2332 | const struct dwarf2_section_names *names) | |
233a11ab | 2333 | { |
251d32d9 TG |
2334 | if (names->normal != NULL |
2335 | && strcmp (section_name, names->normal) == 0) | |
2336 | return 1; | |
2337 | if (names->compressed != NULL | |
2338 | && strcmp (section_name, names->compressed) == 0) | |
2339 | return 1; | |
2340 | return 0; | |
233a11ab CS |
2341 | } |
2342 | ||
330cdd98 | 2343 | /* See declaration. */ |
c906108c | 2344 | |
330cdd98 PA |
2345 | void |
2346 | dwarf2_per_objfile::locate_sections (bfd *abfd, asection *sectp, | |
2347 | const dwarf2_debug_sections &names) | |
c906108c | 2348 | { |
fd361982 | 2349 | flagword aflag = bfd_section_flags (sectp); |
251d32d9 | 2350 | |
dc7650b8 JK |
2351 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
2352 | { | |
2353 | } | |
330cdd98 | 2354 | else if (section_is_p (sectp->name, &names.info)) |
c906108c | 2355 | { |
330cdd98 | 2356 | this->info.s.section = sectp; |
fd361982 | 2357 | this->info.size = bfd_section_size (sectp); |
c906108c | 2358 | } |
330cdd98 | 2359 | else if (section_is_p (sectp->name, &names.abbrev)) |
c906108c | 2360 | { |
330cdd98 | 2361 | this->abbrev.s.section = sectp; |
fd361982 | 2362 | this->abbrev.size = bfd_section_size (sectp); |
c906108c | 2363 | } |
330cdd98 | 2364 | else if (section_is_p (sectp->name, &names.line)) |
c906108c | 2365 | { |
330cdd98 | 2366 | this->line.s.section = sectp; |
fd361982 | 2367 | this->line.size = bfd_section_size (sectp); |
c906108c | 2368 | } |
330cdd98 | 2369 | else if (section_is_p (sectp->name, &names.loc)) |
c906108c | 2370 | { |
330cdd98 | 2371 | this->loc.s.section = sectp; |
fd361982 | 2372 | this->loc.size = bfd_section_size (sectp); |
c906108c | 2373 | } |
330cdd98 | 2374 | else if (section_is_p (sectp->name, &names.loclists)) |
43988095 | 2375 | { |
330cdd98 | 2376 | this->loclists.s.section = sectp; |
fd361982 | 2377 | this->loclists.size = bfd_section_size (sectp); |
43988095 | 2378 | } |
330cdd98 | 2379 | else if (section_is_p (sectp->name, &names.macinfo)) |
c906108c | 2380 | { |
330cdd98 | 2381 | this->macinfo.s.section = sectp; |
fd361982 | 2382 | this->macinfo.size = bfd_section_size (sectp); |
c906108c | 2383 | } |
330cdd98 | 2384 | else if (section_is_p (sectp->name, &names.macro)) |
cf2c3c16 | 2385 | { |
330cdd98 | 2386 | this->macro.s.section = sectp; |
fd361982 | 2387 | this->macro.size = bfd_section_size (sectp); |
cf2c3c16 | 2388 | } |
330cdd98 | 2389 | else if (section_is_p (sectp->name, &names.str)) |
c906108c | 2390 | { |
330cdd98 | 2391 | this->str.s.section = sectp; |
fd361982 | 2392 | this->str.size = bfd_section_size (sectp); |
c906108c | 2393 | } |
330cdd98 | 2394 | else if (section_is_p (sectp->name, &names.line_str)) |
43988095 | 2395 | { |
330cdd98 | 2396 | this->line_str.s.section = sectp; |
fd361982 | 2397 | this->line_str.size = bfd_section_size (sectp); |
43988095 | 2398 | } |
330cdd98 | 2399 | else if (section_is_p (sectp->name, &names.addr)) |
3019eac3 | 2400 | { |
330cdd98 | 2401 | this->addr.s.section = sectp; |
fd361982 | 2402 | this->addr.size = bfd_section_size (sectp); |
3019eac3 | 2403 | } |
330cdd98 | 2404 | else if (section_is_p (sectp->name, &names.frame)) |
b6af0555 | 2405 | { |
330cdd98 | 2406 | this->frame.s.section = sectp; |
fd361982 | 2407 | this->frame.size = bfd_section_size (sectp); |
b6af0555 | 2408 | } |
330cdd98 | 2409 | else if (section_is_p (sectp->name, &names.eh_frame)) |
b6af0555 | 2410 | { |
330cdd98 | 2411 | this->eh_frame.s.section = sectp; |
fd361982 | 2412 | this->eh_frame.size = bfd_section_size (sectp); |
b6af0555 | 2413 | } |
330cdd98 | 2414 | else if (section_is_p (sectp->name, &names.ranges)) |
af34e669 | 2415 | { |
330cdd98 | 2416 | this->ranges.s.section = sectp; |
fd361982 | 2417 | this->ranges.size = bfd_section_size (sectp); |
af34e669 | 2418 | } |
330cdd98 | 2419 | else if (section_is_p (sectp->name, &names.rnglists)) |
43988095 | 2420 | { |
330cdd98 | 2421 | this->rnglists.s.section = sectp; |
fd361982 | 2422 | this->rnglists.size = bfd_section_size (sectp); |
43988095 | 2423 | } |
330cdd98 | 2424 | else if (section_is_p (sectp->name, &names.types)) |
348e048f | 2425 | { |
8b70b953 TT |
2426 | struct dwarf2_section_info type_section; |
2427 | ||
2428 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 2429 | type_section.s.section = sectp; |
fd361982 | 2430 | type_section.size = bfd_section_size (sectp); |
8b70b953 | 2431 | |
fd5866f6 | 2432 | this->types.push_back (type_section); |
348e048f | 2433 | } |
330cdd98 | 2434 | else if (section_is_p (sectp->name, &names.gdb_index)) |
9291a0cd | 2435 | { |
330cdd98 | 2436 | this->gdb_index.s.section = sectp; |
fd361982 | 2437 | this->gdb_index.size = bfd_section_size (sectp); |
9291a0cd | 2438 | } |
927aa2e7 JK |
2439 | else if (section_is_p (sectp->name, &names.debug_names)) |
2440 | { | |
2441 | this->debug_names.s.section = sectp; | |
fd361982 | 2442 | this->debug_names.size = bfd_section_size (sectp); |
927aa2e7 JK |
2443 | } |
2444 | else if (section_is_p (sectp->name, &names.debug_aranges)) | |
2445 | { | |
2446 | this->debug_aranges.s.section = sectp; | |
fd361982 | 2447 | this->debug_aranges.size = bfd_section_size (sectp); |
927aa2e7 | 2448 | } |
dce234bc | 2449 | |
fd361982 AM |
2450 | if ((bfd_section_flags (sectp) & (SEC_LOAD | SEC_ALLOC)) |
2451 | && bfd_section_vma (sectp) == 0) | |
330cdd98 | 2452 | this->has_section_at_zero = true; |
c906108c SS |
2453 | } |
2454 | ||
fceca515 DE |
2455 | /* A helper function that decides whether a section is empty, |
2456 | or not present. */ | |
9e0ac564 TT |
2457 | |
2458 | static int | |
19ac8c2e | 2459 | dwarf2_section_empty_p (const struct dwarf2_section_info *section) |
9e0ac564 | 2460 | { |
73869dc2 DE |
2461 | if (section->is_virtual) |
2462 | return section->size == 0; | |
049412e3 | 2463 | return section->s.section == NULL || section->size == 0; |
9e0ac564 TT |
2464 | } |
2465 | ||
cd4fb1b2 | 2466 | /* See dwarf2read.h. */ |
c906108c | 2467 | |
cd4fb1b2 SM |
2468 | void |
2469 | dwarf2_read_section (struct objfile *objfile, dwarf2_section_info *info) | |
c906108c | 2470 | { |
a32a8923 | 2471 | asection *sectp; |
3019eac3 | 2472 | bfd *abfd; |
dce234bc | 2473 | gdb_byte *buf, *retbuf; |
c906108c | 2474 | |
be391dca TT |
2475 | if (info->readin) |
2476 | return; | |
dce234bc | 2477 | info->buffer = NULL; |
dc4ccb6f | 2478 | info->readin = true; |
188dd5d6 | 2479 | |
9e0ac564 | 2480 | if (dwarf2_section_empty_p (info)) |
dce234bc | 2481 | return; |
c906108c | 2482 | |
a32a8923 | 2483 | sectp = get_section_bfd_section (info); |
3019eac3 | 2484 | |
73869dc2 DE |
2485 | /* If this is a virtual section we need to read in the real one first. */ |
2486 | if (info->is_virtual) | |
2487 | { | |
2488 | struct dwarf2_section_info *containing_section = | |
2489 | get_containing_section (info); | |
2490 | ||
2491 | gdb_assert (sectp != NULL); | |
2492 | if ((sectp->flags & SEC_RELOC) != 0) | |
2493 | { | |
2494 | error (_("Dwarf Error: DWP format V2 with relocations is not" | |
2495 | " supported in section %s [in module %s]"), | |
2496 | get_section_name (info), get_section_file_name (info)); | |
2497 | } | |
2498 | dwarf2_read_section (objfile, containing_section); | |
2499 | /* Other code should have already caught virtual sections that don't | |
2500 | fit. */ | |
2501 | gdb_assert (info->virtual_offset + info->size | |
2502 | <= containing_section->size); | |
2503 | /* If the real section is empty or there was a problem reading the | |
2504 | section we shouldn't get here. */ | |
2505 | gdb_assert (containing_section->buffer != NULL); | |
2506 | info->buffer = containing_section->buffer + info->virtual_offset; | |
2507 | return; | |
2508 | } | |
2509 | ||
4bf44c1c TT |
2510 | /* If the section has relocations, we must read it ourselves. |
2511 | Otherwise we attach it to the BFD. */ | |
2512 | if ((sectp->flags & SEC_RELOC) == 0) | |
dce234bc | 2513 | { |
d521ce57 | 2514 | info->buffer = gdb_bfd_map_section (sectp, &info->size); |
4bf44c1c | 2515 | return; |
dce234bc | 2516 | } |
dce234bc | 2517 | |
224c3ddb | 2518 | buf = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, info->size); |
4bf44c1c | 2519 | info->buffer = buf; |
dce234bc PP |
2520 | |
2521 | /* When debugging .o files, we may need to apply relocations; see | |
2522 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
2523 | We never compress sections in .o files, so we only need to | |
2524 | try this when the section is not compressed. */ | |
ac8035ab | 2525 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
dce234bc PP |
2526 | if (retbuf != NULL) |
2527 | { | |
2528 | info->buffer = retbuf; | |
2529 | return; | |
2530 | } | |
2531 | ||
a32a8923 DE |
2532 | abfd = get_section_bfd_owner (info); |
2533 | gdb_assert (abfd != NULL); | |
2534 | ||
dce234bc PP |
2535 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 |
2536 | || bfd_bread (buf, info->size, abfd) != info->size) | |
19ac8c2e DE |
2537 | { |
2538 | error (_("Dwarf Error: Can't read DWARF data" | |
2539 | " in section %s [in module %s]"), | |
fd361982 | 2540 | bfd_section_name (sectp), bfd_get_filename (abfd)); |
19ac8c2e | 2541 | } |
dce234bc PP |
2542 | } |
2543 | ||
9e0ac564 TT |
2544 | /* A helper function that returns the size of a section in a safe way. |
2545 | If you are positive that the section has been read before using the | |
2546 | size, then it is safe to refer to the dwarf2_section_info object's | |
2547 | "size" field directly. In other cases, you must call this | |
2548 | function, because for compressed sections the size field is not set | |
2549 | correctly until the section has been read. */ | |
2550 | ||
2551 | static bfd_size_type | |
2552 | dwarf2_section_size (struct objfile *objfile, | |
2553 | struct dwarf2_section_info *info) | |
2554 | { | |
2555 | if (!info->readin) | |
2556 | dwarf2_read_section (objfile, info); | |
2557 | return info->size; | |
2558 | } | |
2559 | ||
dce234bc | 2560 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 2561 | SECTION_NAME. */ |
af34e669 | 2562 | |
dce234bc | 2563 | void |
3017a003 TG |
2564 | dwarf2_get_section_info (struct objfile *objfile, |
2565 | enum dwarf2_section_enum sect, | |
d521ce57 | 2566 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
2567 | bfd_size_type *sizep) |
2568 | { | |
5bfd760d | 2569 | struct dwarf2_per_objfile *data = dwarf2_objfile_data_key.get (objfile); |
dce234bc | 2570 | struct dwarf2_section_info *info; |
a3b2a86b TT |
2571 | |
2572 | /* We may see an objfile without any DWARF, in which case we just | |
2573 | return nothing. */ | |
2574 | if (data == NULL) | |
2575 | { | |
2576 | *sectp = NULL; | |
2577 | *bufp = NULL; | |
2578 | *sizep = 0; | |
2579 | return; | |
2580 | } | |
3017a003 TG |
2581 | switch (sect) |
2582 | { | |
2583 | case DWARF2_DEBUG_FRAME: | |
2584 | info = &data->frame; | |
2585 | break; | |
2586 | case DWARF2_EH_FRAME: | |
2587 | info = &data->eh_frame; | |
2588 | break; | |
2589 | default: | |
2590 | gdb_assert_not_reached ("unexpected section"); | |
2591 | } | |
dce234bc | 2592 | |
9e0ac564 | 2593 | dwarf2_read_section (objfile, info); |
dce234bc | 2594 | |
a32a8923 | 2595 | *sectp = get_section_bfd_section (info); |
dce234bc PP |
2596 | *bufp = info->buffer; |
2597 | *sizep = info->size; | |
2598 | } | |
2599 | ||
36586728 TT |
2600 | /* A helper function to find the sections for a .dwz file. */ |
2601 | ||
2602 | static void | |
2603 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2604 | { | |
9a3c8263 | 2605 | struct dwz_file *dwz_file = (struct dwz_file *) arg; |
36586728 TT |
2606 | |
2607 | /* Note that we only support the standard ELF names, because .dwz | |
2608 | is ELF-only (at the time of writing). */ | |
2609 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2610 | { | |
049412e3 | 2611 | dwz_file->abbrev.s.section = sectp; |
fd361982 | 2612 | dwz_file->abbrev.size = bfd_section_size (sectp); |
36586728 TT |
2613 | } |
2614 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2615 | { | |
049412e3 | 2616 | dwz_file->info.s.section = sectp; |
fd361982 | 2617 | dwz_file->info.size = bfd_section_size (sectp); |
36586728 TT |
2618 | } |
2619 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2620 | { | |
049412e3 | 2621 | dwz_file->str.s.section = sectp; |
fd361982 | 2622 | dwz_file->str.size = bfd_section_size (sectp); |
36586728 TT |
2623 | } |
2624 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2625 | { | |
049412e3 | 2626 | dwz_file->line.s.section = sectp; |
fd361982 | 2627 | dwz_file->line.size = bfd_section_size (sectp); |
36586728 TT |
2628 | } |
2629 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2630 | { | |
049412e3 | 2631 | dwz_file->macro.s.section = sectp; |
fd361982 | 2632 | dwz_file->macro.size = bfd_section_size (sectp); |
36586728 | 2633 | } |
2ec9a5e0 TT |
2634 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2635 | { | |
049412e3 | 2636 | dwz_file->gdb_index.s.section = sectp; |
fd361982 | 2637 | dwz_file->gdb_index.size = bfd_section_size (sectp); |
2ec9a5e0 | 2638 | } |
927aa2e7 JK |
2639 | else if (section_is_p (sectp->name, &dwarf2_elf_names.debug_names)) |
2640 | { | |
2641 | dwz_file->debug_names.s.section = sectp; | |
fd361982 | 2642 | dwz_file->debug_names.size = bfd_section_size (sectp); |
927aa2e7 | 2643 | } |
36586728 TT |
2644 | } |
2645 | ||
c4973306 | 2646 | /* See dwarf2read.h. */ |
36586728 | 2647 | |
c4973306 | 2648 | struct dwz_file * |
ed2dc618 | 2649 | dwarf2_get_dwz_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
36586728 | 2650 | { |
36586728 | 2651 | const char *filename; |
acd13123 | 2652 | bfd_size_type buildid_len_arg; |
dc294be5 TT |
2653 | size_t buildid_len; |
2654 | bfd_byte *buildid; | |
36586728 TT |
2655 | |
2656 | if (dwarf2_per_objfile->dwz_file != NULL) | |
7ff8cb8c | 2657 | return dwarf2_per_objfile->dwz_file.get (); |
36586728 | 2658 | |
4db1a1dc | 2659 | bfd_set_error (bfd_error_no_error); |
791afaa2 TT |
2660 | gdb::unique_xmalloc_ptr<char> data |
2661 | (bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
2662 | &buildid_len_arg, &buildid)); | |
4db1a1dc TT |
2663 | if (data == NULL) |
2664 | { | |
2665 | if (bfd_get_error () == bfd_error_no_error) | |
2666 | return NULL; | |
2667 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2668 | bfd_errmsg (bfd_get_error ())); | |
2669 | } | |
791afaa2 TT |
2670 | |
2671 | gdb::unique_xmalloc_ptr<bfd_byte> buildid_holder (buildid); | |
36586728 | 2672 | |
acd13123 TT |
2673 | buildid_len = (size_t) buildid_len_arg; |
2674 | ||
791afaa2 | 2675 | filename = data.get (); |
d721ba37 PA |
2676 | |
2677 | std::string abs_storage; | |
36586728 TT |
2678 | if (!IS_ABSOLUTE_PATH (filename)) |
2679 | { | |
14278e1f TT |
2680 | gdb::unique_xmalloc_ptr<char> abs |
2681 | = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); | |
36586728 | 2682 | |
14278e1f | 2683 | abs_storage = ldirname (abs.get ()) + SLASH_STRING + filename; |
d721ba37 | 2684 | filename = abs_storage.c_str (); |
36586728 TT |
2685 | } |
2686 | ||
dc294be5 TT |
2687 | /* First try the file name given in the section. If that doesn't |
2688 | work, try to use the build-id instead. */ | |
192b62ce | 2689 | gdb_bfd_ref_ptr dwz_bfd (gdb_bfd_open (filename, gnutarget, -1)); |
dc294be5 | 2690 | if (dwz_bfd != NULL) |
36586728 | 2691 | { |
192b62ce | 2692 | if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) |
0f58c9e8 | 2693 | dwz_bfd.reset (nullptr); |
36586728 TT |
2694 | } |
2695 | ||
dc294be5 TT |
2696 | if (dwz_bfd == NULL) |
2697 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); | |
2698 | ||
2699 | if (dwz_bfd == NULL) | |
2700 | error (_("could not find '.gnu_debugaltlink' file for %s"), | |
2701 | objfile_name (dwarf2_per_objfile->objfile)); | |
2702 | ||
7ff8cb8c TT |
2703 | std::unique_ptr<struct dwz_file> result |
2704 | (new struct dwz_file (std::move (dwz_bfd))); | |
36586728 | 2705 | |
7ff8cb8c TT |
2706 | bfd_map_over_sections (result->dwz_bfd.get (), locate_dwz_sections, |
2707 | result.get ()); | |
36586728 | 2708 | |
7ff8cb8c TT |
2709 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, |
2710 | result->dwz_bfd.get ()); | |
2711 | dwarf2_per_objfile->dwz_file = std::move (result); | |
2712 | return dwarf2_per_objfile->dwz_file.get (); | |
36586728 | 2713 | } |
9291a0cd | 2714 | \f |
7b9f3c50 DE |
2715 | /* DWARF quick_symbols_functions support. */ |
2716 | ||
2717 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2718 | unique line tables, so we maintain a separate table of all .debug_line | |
2719 | derived entries to support the sharing. | |
2720 | All the quick functions need is the list of file names. We discard the | |
2721 | line_header when we're done and don't need to record it here. */ | |
2722 | struct quick_file_names | |
2723 | { | |
094b34ac DE |
2724 | /* The data used to construct the hash key. */ |
2725 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2726 | |
2727 | /* The number of entries in file_names, real_names. */ | |
2728 | unsigned int num_file_names; | |
2729 | ||
2730 | /* The file names from the line table, after being run through | |
2731 | file_full_name. */ | |
2732 | const char **file_names; | |
2733 | ||
2734 | /* The file names from the line table after being run through | |
2735 | gdb_realpath. These are computed lazily. */ | |
2736 | const char **real_names; | |
2737 | }; | |
2738 | ||
2739 | /* When using the index (and thus not using psymtabs), each CU has an | |
2740 | object of this type. This is used to hold information needed by | |
2741 | the various "quick" methods. */ | |
2742 | struct dwarf2_per_cu_quick_data | |
2743 | { | |
2744 | /* The file table. This can be NULL if there was no file table | |
2745 | or it's currently not read in. | |
2746 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2747 | struct quick_file_names *file_names; | |
2748 | ||
2749 | /* The corresponding symbol table. This is NULL if symbols for this | |
2750 | CU have not yet been read. */ | |
43f3e411 | 2751 | struct compunit_symtab *compunit_symtab; |
7b9f3c50 DE |
2752 | |
2753 | /* A temporary mark bit used when iterating over all CUs in | |
2754 | expand_symtabs_matching. */ | |
2755 | unsigned int mark : 1; | |
2756 | ||
2757 | /* True if we've tried to read the file table and found there isn't one. | |
2758 | There will be no point in trying to read it again next time. */ | |
2759 | unsigned int no_file_data : 1; | |
2760 | }; | |
2761 | ||
094b34ac DE |
2762 | /* Utility hash function for a stmt_list_hash. */ |
2763 | ||
2764 | static hashval_t | |
2765 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2766 | { | |
2767 | hashval_t v = 0; | |
2768 | ||
2769 | if (stmt_list_hash->dwo_unit != NULL) | |
2770 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
9c541725 | 2771 | v += to_underlying (stmt_list_hash->line_sect_off); |
094b34ac DE |
2772 | return v; |
2773 | } | |
2774 | ||
2775 | /* Utility equality function for a stmt_list_hash. */ | |
2776 | ||
2777 | static int | |
2778 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2779 | const struct stmt_list_hash *rhs) | |
2780 | { | |
2781 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2782 | return 0; | |
2783 | if (lhs->dwo_unit != NULL | |
2784 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2785 | return 0; | |
2786 | ||
9c541725 | 2787 | return lhs->line_sect_off == rhs->line_sect_off; |
094b34ac DE |
2788 | } |
2789 | ||
7b9f3c50 DE |
2790 | /* Hash function for a quick_file_names. */ |
2791 | ||
2792 | static hashval_t | |
2793 | hash_file_name_entry (const void *e) | |
2794 | { | |
9a3c8263 SM |
2795 | const struct quick_file_names *file_data |
2796 | = (const struct quick_file_names *) e; | |
7b9f3c50 | 2797 | |
094b34ac | 2798 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2799 | } |
2800 | ||
2801 | /* Equality function for a quick_file_names. */ | |
2802 | ||
2803 | static int | |
2804 | eq_file_name_entry (const void *a, const void *b) | |
2805 | { | |
9a3c8263 SM |
2806 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
2807 | const struct quick_file_names *eb = (const struct quick_file_names *) b; | |
7b9f3c50 | 2808 | |
094b34ac | 2809 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2810 | } |
2811 | ||
2812 | /* Delete function for a quick_file_names. */ | |
2813 | ||
2814 | static void | |
2815 | delete_file_name_entry (void *e) | |
2816 | { | |
9a3c8263 | 2817 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
7b9f3c50 DE |
2818 | int i; |
2819 | ||
2820 | for (i = 0; i < file_data->num_file_names; ++i) | |
2821 | { | |
2822 | xfree ((void*) file_data->file_names[i]); | |
2823 | if (file_data->real_names) | |
2824 | xfree ((void*) file_data->real_names[i]); | |
2825 | } | |
2826 | ||
2827 | /* The space for the struct itself lives on objfile_obstack, | |
2828 | so we don't free it here. */ | |
2829 | } | |
2830 | ||
2831 | /* Create a quick_file_names hash table. */ | |
2832 | ||
2833 | static htab_t | |
2834 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
2835 | { | |
2836 | return htab_create_alloc (nr_initial_entries, | |
2837 | hash_file_name_entry, eq_file_name_entry, | |
2838 | delete_file_name_entry, xcalloc, xfree); | |
2839 | } | |
9291a0cd | 2840 | |
918dd910 JK |
2841 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2842 | have to be created afterwards. You should call age_cached_comp_units after | |
2843 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2844 | ||
2845 | static void | |
58f0c718 | 2846 | load_cu (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
918dd910 | 2847 | { |
3019eac3 | 2848 | if (per_cu->is_debug_types) |
e5fe5e75 | 2849 | load_full_type_unit (per_cu); |
918dd910 | 2850 | else |
58f0c718 | 2851 | load_full_comp_unit (per_cu, skip_partial, language_minimal); |
918dd910 | 2852 | |
cc12ce38 DE |
2853 | if (per_cu->cu == NULL) |
2854 | return; /* Dummy CU. */ | |
2dc860c0 DE |
2855 | |
2856 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2857 | } |
2858 | ||
a0f42c21 | 2859 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2860 | |
9291a0cd | 2861 | static void |
58f0c718 | 2862 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
9291a0cd | 2863 | { |
ed2dc618 | 2864 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
9291a0cd | 2865 | |
f4dc4d17 DE |
2866 | /* Skip type_unit_groups, reading the type units they contain |
2867 | is handled elsewhere. */ | |
2868 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
2869 | return; | |
2870 | ||
b303c6f6 AB |
2871 | /* The destructor of dwarf2_queue_guard frees any entries left on |
2872 | the queue. After this point we're guaranteed to leave this function | |
2873 | with the dwarf queue empty. */ | |
2874 | dwarf2_queue_guard q_guard; | |
9291a0cd | 2875 | |
95554aad | 2876 | if (dwarf2_per_objfile->using_index |
43f3e411 | 2877 | ? per_cu->v.quick->compunit_symtab == NULL |
95554aad TT |
2878 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) |
2879 | { | |
2880 | queue_comp_unit (per_cu, language_minimal); | |
58f0c718 | 2881 | load_cu (per_cu, skip_partial); |
89e63ee4 DE |
2882 | |
2883 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2884 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2885 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2886 | if (!per_cu->is_debug_types | |
cc12ce38 | 2887 | && per_cu->cu != NULL |
89e63ee4 DE |
2888 | && per_cu->cu->dwo_unit != NULL |
2889 | && dwarf2_per_objfile->index_table != NULL | |
2890 | && dwarf2_per_objfile->index_table->version <= 7 | |
2891 | /* DWP files aren't supported yet. */ | |
ed2dc618 | 2892 | && get_dwp_file (dwarf2_per_objfile) == NULL) |
89e63ee4 | 2893 | queue_and_load_all_dwo_tus (per_cu); |
95554aad | 2894 | } |
9291a0cd | 2895 | |
ed2dc618 | 2896 | process_queue (dwarf2_per_objfile); |
9291a0cd TT |
2897 | |
2898 | /* Age the cache, releasing compilation units that have not | |
2899 | been used recently. */ | |
ed2dc618 | 2900 | age_cached_comp_units (dwarf2_per_objfile); |
9291a0cd TT |
2901 | } |
2902 | ||
2903 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2904 | the objfile from which this CU came. Returns the resulting symbol | |
2905 | table. */ | |
2fdf6df6 | 2906 | |
43f3e411 | 2907 | static struct compunit_symtab * |
58f0c718 | 2908 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
9291a0cd | 2909 | { |
ed2dc618 SM |
2910 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
2911 | ||
95554aad | 2912 | gdb_assert (dwarf2_per_objfile->using_index); |
43f3e411 | 2913 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd | 2914 | { |
11ed8cad | 2915 | free_cached_comp_units freer (dwarf2_per_objfile); |
c83dd867 | 2916 | scoped_restore decrementer = increment_reading_symtab (); |
58f0c718 | 2917 | dw2_do_instantiate_symtab (per_cu, skip_partial); |
ed2dc618 | 2918 | process_cu_includes (dwarf2_per_objfile); |
9291a0cd | 2919 | } |
f194fefb | 2920 | |
43f3e411 | 2921 | return per_cu->v.quick->compunit_symtab; |
9291a0cd TT |
2922 | } |
2923 | ||
ff4c9fec | 2924 | /* See declaration. */ |
f4dc4d17 | 2925 | |
ff4c9fec SM |
2926 | dwarf2_per_cu_data * |
2927 | dwarf2_per_objfile::get_cutu (int index) | |
2928 | { | |
b76e467d | 2929 | if (index >= this->all_comp_units.size ()) |
ff4c9fec | 2930 | { |
b76e467d | 2931 | index -= this->all_comp_units.size (); |
b2bdb8cf | 2932 | gdb_assert (index < this->all_type_units.size ()); |
ff4c9fec SM |
2933 | return &this->all_type_units[index]->per_cu; |
2934 | } | |
f4dc4d17 | 2935 | |
ff4c9fec SM |
2936 | return this->all_comp_units[index]; |
2937 | } | |
f4dc4d17 | 2938 | |
ff4c9fec | 2939 | /* See declaration. */ |
2fdf6df6 | 2940 | |
ff4c9fec SM |
2941 | dwarf2_per_cu_data * |
2942 | dwarf2_per_objfile::get_cu (int index) | |
1fd400ff | 2943 | { |
b76e467d | 2944 | gdb_assert (index >= 0 && index < this->all_comp_units.size ()); |
f4dc4d17 | 2945 | |
ff4c9fec | 2946 | return this->all_comp_units[index]; |
f4dc4d17 DE |
2947 | } |
2948 | ||
ff4c9fec | 2949 | /* See declaration. */ |
f4dc4d17 | 2950 | |
ff4c9fec SM |
2951 | signatured_type * |
2952 | dwarf2_per_objfile::get_tu (int index) | |
f4dc4d17 | 2953 | { |
b2bdb8cf | 2954 | gdb_assert (index >= 0 && index < this->all_type_units.size ()); |
f4dc4d17 | 2955 | |
ff4c9fec | 2956 | return this->all_type_units[index]; |
1fd400ff TT |
2957 | } |
2958 | ||
4b514bc8 JK |
2959 | /* Return a new dwarf2_per_cu_data allocated on OBJFILE's |
2960 | objfile_obstack, and constructed with the specified field | |
2961 | values. */ | |
2962 | ||
2963 | static dwarf2_per_cu_data * | |
ed2dc618 | 2964 | create_cu_from_index_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
4b514bc8 JK |
2965 | struct dwarf2_section_info *section, |
2966 | int is_dwz, | |
2967 | sect_offset sect_off, ULONGEST length) | |
2968 | { | |
ed2dc618 | 2969 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4b514bc8 JK |
2970 | dwarf2_per_cu_data *the_cu |
2971 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2972 | struct dwarf2_per_cu_data); | |
2973 | the_cu->sect_off = sect_off; | |
2974 | the_cu->length = length; | |
e3b94546 | 2975 | the_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
4b514bc8 JK |
2976 | the_cu->section = section; |
2977 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2978 | struct dwarf2_per_cu_quick_data); | |
2979 | the_cu->is_dwz = is_dwz; | |
2980 | return the_cu; | |
2981 | } | |
2982 | ||
2ec9a5e0 TT |
2983 | /* A helper for create_cus_from_index that handles a given list of |
2984 | CUs. */ | |
2fdf6df6 | 2985 | |
74a0d9f6 | 2986 | static void |
12359b5e | 2987 | create_cus_from_index_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
2ec9a5e0 TT |
2988 | const gdb_byte *cu_list, offset_type n_elements, |
2989 | struct dwarf2_section_info *section, | |
b76e467d | 2990 | int is_dwz) |
9291a0cd | 2991 | { |
12359b5e | 2992 | for (offset_type i = 0; i < n_elements; i += 2) |
9291a0cd | 2993 | { |
74a0d9f6 | 2994 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
2995 | |
2996 | sect_offset sect_off | |
2997 | = (sect_offset) extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
2998 | ULONGEST length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
2999 | cu_list += 2 * 8; |
3000 | ||
b76e467d | 3001 | dwarf2_per_cu_data *per_cu |
ed2dc618 SM |
3002 | = create_cu_from_index_list (dwarf2_per_objfile, section, is_dwz, |
3003 | sect_off, length); | |
b76e467d | 3004 | dwarf2_per_objfile->all_comp_units.push_back (per_cu); |
9291a0cd | 3005 | } |
9291a0cd TT |
3006 | } |
3007 | ||
2ec9a5e0 | 3008 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 3009 | the CU objects for this objfile. */ |
2ec9a5e0 | 3010 | |
74a0d9f6 | 3011 | static void |
12359b5e | 3012 | create_cus_from_index (struct dwarf2_per_objfile *dwarf2_per_objfile, |
2ec9a5e0 TT |
3013 | const gdb_byte *cu_list, offset_type cu_list_elements, |
3014 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
3015 | { | |
b76e467d SM |
3016 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
3017 | dwarf2_per_objfile->all_comp_units.reserve | |
3018 | ((cu_list_elements + dwz_elements) / 2); | |
2ec9a5e0 | 3019 | |
12359b5e | 3020 | create_cus_from_index_list (dwarf2_per_objfile, cu_list, cu_list_elements, |
b76e467d | 3021 | &dwarf2_per_objfile->info, 0); |
2ec9a5e0 TT |
3022 | |
3023 | if (dwz_elements == 0) | |
74a0d9f6 | 3024 | return; |
2ec9a5e0 | 3025 | |
12359b5e SM |
3026 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
3027 | create_cus_from_index_list (dwarf2_per_objfile, dwz_list, dwz_elements, | |
b76e467d | 3028 | &dwz->info, 1); |
2ec9a5e0 TT |
3029 | } |
3030 | ||
1fd400ff | 3031 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 3032 | |
74a0d9f6 | 3033 | static void |
12359b5e SM |
3034 | create_signatured_type_table_from_index |
3035 | (struct dwarf2_per_objfile *dwarf2_per_objfile, | |
3036 | struct dwarf2_section_info *section, | |
3037 | const gdb_byte *bytes, | |
3038 | offset_type elements) | |
1fd400ff | 3039 | { |
12359b5e | 3040 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
1fd400ff | 3041 | |
b2bdb8cf SM |
3042 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
3043 | dwarf2_per_objfile->all_type_units.reserve (elements / 3); | |
1fd400ff | 3044 | |
12359b5e | 3045 | htab_t sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff | 3046 | |
12359b5e | 3047 | for (offset_type i = 0; i < elements; i += 3) |
1fd400ff | 3048 | { |
52dc124a | 3049 | struct signatured_type *sig_type; |
9c541725 | 3050 | ULONGEST signature; |
1fd400ff | 3051 | void **slot; |
9c541725 | 3052 | cu_offset type_offset_in_tu; |
1fd400ff | 3053 | |
74a0d9f6 | 3054 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
3055 | sect_offset sect_off |
3056 | = (sect_offset) extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
3057 | type_offset_in_tu | |
3058 | = (cu_offset) extract_unsigned_integer (bytes + 8, 8, | |
3059 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
3060 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
3061 | bytes += 3 * 8; | |
3062 | ||
52dc124a | 3063 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 3064 | struct signatured_type); |
52dc124a | 3065 | sig_type->signature = signature; |
9c541725 | 3066 | sig_type->type_offset_in_tu = type_offset_in_tu; |
3019eac3 | 3067 | sig_type->per_cu.is_debug_types = 1; |
8a0459fd | 3068 | sig_type->per_cu.section = section; |
9c541725 | 3069 | sig_type->per_cu.sect_off = sect_off; |
e3b94546 | 3070 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
52dc124a | 3071 | sig_type->per_cu.v.quick |
1fd400ff TT |
3072 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3073 | struct dwarf2_per_cu_quick_data); | |
3074 | ||
52dc124a DE |
3075 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
3076 | *slot = sig_type; | |
1fd400ff | 3077 | |
b2bdb8cf | 3078 | dwarf2_per_objfile->all_type_units.push_back (sig_type); |
1fd400ff TT |
3079 | } |
3080 | ||
673bfd45 | 3081 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
3082 | } |
3083 | ||
927aa2e7 JK |
3084 | /* Create the signatured type hash table from .debug_names. */ |
3085 | ||
3086 | static void | |
3087 | create_signatured_type_table_from_debug_names | |
ed2dc618 | 3088 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
3089 | const mapped_debug_names &map, |
3090 | struct dwarf2_section_info *section, | |
3091 | struct dwarf2_section_info *abbrev_section) | |
3092 | { | |
ed2dc618 SM |
3093 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3094 | ||
927aa2e7 JK |
3095 | dwarf2_read_section (objfile, section); |
3096 | dwarf2_read_section (objfile, abbrev_section); | |
3097 | ||
b2bdb8cf SM |
3098 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
3099 | dwarf2_per_objfile->all_type_units.reserve (map.tu_count); | |
927aa2e7 JK |
3100 | |
3101 | htab_t sig_types_hash = allocate_signatured_type_table (objfile); | |
3102 | ||
3103 | for (uint32_t i = 0; i < map.tu_count; ++i) | |
3104 | { | |
3105 | struct signatured_type *sig_type; | |
927aa2e7 | 3106 | void **slot; |
927aa2e7 JK |
3107 | |
3108 | sect_offset sect_off | |
3109 | = (sect_offset) (extract_unsigned_integer | |
3110 | (map.tu_table_reordered + i * map.offset_size, | |
3111 | map.offset_size, | |
3112 | map.dwarf5_byte_order)); | |
3113 | ||
3114 | comp_unit_head cu_header; | |
ed2dc618 SM |
3115 | read_and_check_comp_unit_head (dwarf2_per_objfile, &cu_header, section, |
3116 | abbrev_section, | |
927aa2e7 JK |
3117 | section->buffer + to_underlying (sect_off), |
3118 | rcuh_kind::TYPE); | |
3119 | ||
3120 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
3121 | struct signatured_type); | |
3122 | sig_type->signature = cu_header.signature; | |
3123 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
3124 | sig_type->per_cu.is_debug_types = 1; | |
3125 | sig_type->per_cu.section = section; | |
3126 | sig_type->per_cu.sect_off = sect_off; | |
e3b94546 | 3127 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
927aa2e7 JK |
3128 | sig_type->per_cu.v.quick |
3129 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
3130 | struct dwarf2_per_cu_quick_data); | |
3131 | ||
3132 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); | |
3133 | *slot = sig_type; | |
3134 | ||
b2bdb8cf | 3135 | dwarf2_per_objfile->all_type_units.push_back (sig_type); |
927aa2e7 JK |
3136 | } |
3137 | ||
3138 | dwarf2_per_objfile->signatured_types = sig_types_hash; | |
3139 | } | |
3140 | ||
9291a0cd TT |
3141 | /* Read the address map data from the mapped index, and use it to |
3142 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 3143 | |
9291a0cd | 3144 | static void |
ed2dc618 SM |
3145 | create_addrmap_from_index (struct dwarf2_per_objfile *dwarf2_per_objfile, |
3146 | struct mapped_index *index) | |
9291a0cd | 3147 | { |
ed2dc618 | 3148 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 3149 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9291a0cd | 3150 | const gdb_byte *iter, *end; |
9291a0cd | 3151 | struct addrmap *mutable_map; |
9291a0cd TT |
3152 | CORE_ADDR baseaddr; |
3153 | ||
8268c778 PA |
3154 | auto_obstack temp_obstack; |
3155 | ||
9291a0cd TT |
3156 | mutable_map = addrmap_create_mutable (&temp_obstack); |
3157 | ||
f00a2de2 PA |
3158 | iter = index->address_table.data (); |
3159 | end = iter + index->address_table.size (); | |
9291a0cd TT |
3160 | |
3161 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
3162 | ||
3163 | while (iter < end) | |
3164 | { | |
3165 | ULONGEST hi, lo, cu_index; | |
3166 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3167 | iter += 8; | |
3168 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3169 | iter += 8; | |
3170 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
3171 | iter += 4; | |
f652bce2 | 3172 | |
24a55014 | 3173 | if (lo > hi) |
f652bce2 | 3174 | { |
b98664d3 | 3175 | complaint (_(".gdb_index address table has invalid range (%s - %s)"), |
c0cd8254 | 3176 | hex_string (lo), hex_string (hi)); |
24a55014 | 3177 | continue; |
f652bce2 | 3178 | } |
24a55014 | 3179 | |
b76e467d | 3180 | if (cu_index >= dwarf2_per_objfile->all_comp_units.size ()) |
f652bce2 | 3181 | { |
b98664d3 | 3182 | complaint (_(".gdb_index address table has invalid CU number %u"), |
f652bce2 | 3183 | (unsigned) cu_index); |
24a55014 | 3184 | continue; |
f652bce2 | 3185 | } |
24a55014 | 3186 | |
79748972 TT |
3187 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr) - baseaddr; |
3188 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr) - baseaddr; | |
ed2dc618 | 3189 | addrmap_set_empty (mutable_map, lo, hi - 1, |
ff4c9fec | 3190 | dwarf2_per_objfile->get_cu (cu_index)); |
9291a0cd TT |
3191 | } |
3192 | ||
d320c2b5 | 3193 | objfile->partial_symtabs->psymtabs_addrmap |
5923a04c | 3194 | = addrmap_create_fixed (mutable_map, objfile->partial_symtabs->obstack ()); |
9291a0cd TT |
3195 | } |
3196 | ||
927aa2e7 JK |
3197 | /* Read the address map data from DWARF-5 .debug_aranges, and use it to |
3198 | populate the objfile's psymtabs_addrmap. */ | |
3199 | ||
3200 | static void | |
ed2dc618 | 3201 | create_addrmap_from_aranges (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
3202 | struct dwarf2_section_info *section) |
3203 | { | |
ed2dc618 | 3204 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
927aa2e7 JK |
3205 | bfd *abfd = objfile->obfd; |
3206 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
3207 | const CORE_ADDR baseaddr = ANOFFSET (objfile->section_offsets, | |
3208 | SECT_OFF_TEXT (objfile)); | |
3209 | ||
3210 | auto_obstack temp_obstack; | |
3211 | addrmap *mutable_map = addrmap_create_mutable (&temp_obstack); | |
3212 | ||
3213 | std::unordered_map<sect_offset, | |
3214 | dwarf2_per_cu_data *, | |
3215 | gdb::hash_enum<sect_offset>> | |
3216 | debug_info_offset_to_per_cu; | |
b76e467d | 3217 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 3218 | { |
927aa2e7 JK |
3219 | const auto insertpair |
3220 | = debug_info_offset_to_per_cu.emplace (per_cu->sect_off, per_cu); | |
3221 | if (!insertpair.second) | |
3222 | { | |
3223 | warning (_("Section .debug_aranges in %s has duplicate " | |
9d8780f0 SM |
3224 | "debug_info_offset %s, ignoring .debug_aranges."), |
3225 | objfile_name (objfile), sect_offset_str (per_cu->sect_off)); | |
927aa2e7 JK |
3226 | return; |
3227 | } | |
3228 | } | |
3229 | ||
3230 | dwarf2_read_section (objfile, section); | |
3231 | ||
3232 | const bfd_endian dwarf5_byte_order = gdbarch_byte_order (gdbarch); | |
3233 | ||
3234 | const gdb_byte *addr = section->buffer; | |
3235 | ||
3236 | while (addr < section->buffer + section->size) | |
3237 | { | |
3238 | const gdb_byte *const entry_addr = addr; | |
3239 | unsigned int bytes_read; | |
3240 | ||
3241 | const LONGEST entry_length = read_initial_length (abfd, addr, | |
3242 | &bytes_read); | |
3243 | addr += bytes_read; | |
3244 | ||
3245 | const gdb_byte *const entry_end = addr + entry_length; | |
3246 | const bool dwarf5_is_dwarf64 = bytes_read != 4; | |
3247 | const uint8_t offset_size = dwarf5_is_dwarf64 ? 8 : 4; | |
3248 | if (addr + entry_length > section->buffer + section->size) | |
3249 | { | |
47e3f474 | 3250 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
3251 | "length %s exceeds section length %s, " |
3252 | "ignoring .debug_aranges."), | |
47e3f474 TV |
3253 | objfile_name (objfile), |
3254 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
3255 | plongest (bytes_read + entry_length), |
3256 | pulongest (section->size)); | |
3257 | return; | |
3258 | } | |
3259 | ||
3260 | /* The version number. */ | |
3261 | const uint16_t version = read_2_bytes (abfd, addr); | |
3262 | addr += 2; | |
3263 | if (version != 2) | |
3264 | { | |
47e3f474 | 3265 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 3266 | "has unsupported version %d, ignoring .debug_aranges."), |
47e3f474 TV |
3267 | objfile_name (objfile), |
3268 | plongest (entry_addr - section->buffer), version); | |
927aa2e7 JK |
3269 | return; |
3270 | } | |
3271 | ||
3272 | const uint64_t debug_info_offset | |
3273 | = extract_unsigned_integer (addr, offset_size, dwarf5_byte_order); | |
3274 | addr += offset_size; | |
3275 | const auto per_cu_it | |
3276 | = debug_info_offset_to_per_cu.find (sect_offset (debug_info_offset)); | |
3277 | if (per_cu_it == debug_info_offset_to_per_cu.cend ()) | |
3278 | { | |
47e3f474 | 3279 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
3280 | "debug_info_offset %s does not exists, " |
3281 | "ignoring .debug_aranges."), | |
47e3f474 TV |
3282 | objfile_name (objfile), |
3283 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
3284 | pulongest (debug_info_offset)); |
3285 | return; | |
3286 | } | |
3287 | dwarf2_per_cu_data *const per_cu = per_cu_it->second; | |
3288 | ||
3289 | const uint8_t address_size = *addr++; | |
3290 | if (address_size < 1 || address_size > 8) | |
3291 | { | |
47e3f474 | 3292 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 3293 | "address_size %u is invalid, ignoring .debug_aranges."), |
47e3f474 TV |
3294 | objfile_name (objfile), |
3295 | plongest (entry_addr - section->buffer), address_size); | |
927aa2e7 JK |
3296 | return; |
3297 | } | |
3298 | ||
3299 | const uint8_t segment_selector_size = *addr++; | |
3300 | if (segment_selector_size != 0) | |
3301 | { | |
47e3f474 | 3302 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
3303 | "segment_selector_size %u is not supported, " |
3304 | "ignoring .debug_aranges."), | |
47e3f474 TV |
3305 | objfile_name (objfile), |
3306 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
3307 | segment_selector_size); |
3308 | return; | |
3309 | } | |
3310 | ||
3311 | /* Must pad to an alignment boundary that is twice the address | |
3312 | size. It is undocumented by the DWARF standard but GCC does | |
3313 | use it. */ | |
3314 | for (size_t padding = ((-(addr - section->buffer)) | |
3315 | & (2 * address_size - 1)); | |
3316 | padding > 0; padding--) | |
3317 | if (*addr++ != 0) | |
3318 | { | |
47e3f474 | 3319 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 3320 | "padding is not zero, ignoring .debug_aranges."), |
47e3f474 TV |
3321 | objfile_name (objfile), |
3322 | plongest (entry_addr - section->buffer)); | |
927aa2e7 JK |
3323 | return; |
3324 | } | |
3325 | ||
3326 | for (;;) | |
3327 | { | |
3328 | if (addr + 2 * address_size > entry_end) | |
3329 | { | |
47e3f474 | 3330 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
3331 | "address list is not properly terminated, " |
3332 | "ignoring .debug_aranges."), | |
47e3f474 TV |
3333 | objfile_name (objfile), |
3334 | plongest (entry_addr - section->buffer)); | |
927aa2e7 JK |
3335 | return; |
3336 | } | |
3337 | ULONGEST start = extract_unsigned_integer (addr, address_size, | |
3338 | dwarf5_byte_order); | |
3339 | addr += address_size; | |
3340 | ULONGEST length = extract_unsigned_integer (addr, address_size, | |
3341 | dwarf5_byte_order); | |
3342 | addr += address_size; | |
3343 | if (start == 0 && length == 0) | |
3344 | break; | |
3345 | if (start == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
3346 | { | |
3347 | /* Symbol was eliminated due to a COMDAT group. */ | |
3348 | continue; | |
3349 | } | |
3350 | ULONGEST end = start + length; | |
79748972 TT |
3351 | start = (gdbarch_adjust_dwarf2_addr (gdbarch, start + baseaddr) |
3352 | - baseaddr); | |
3353 | end = (gdbarch_adjust_dwarf2_addr (gdbarch, end + baseaddr) | |
3354 | - baseaddr); | |
927aa2e7 JK |
3355 | addrmap_set_empty (mutable_map, start, end - 1, per_cu); |
3356 | } | |
3357 | } | |
3358 | ||
d320c2b5 | 3359 | objfile->partial_symtabs->psymtabs_addrmap |
5923a04c | 3360 | = addrmap_create_fixed (mutable_map, objfile->partial_symtabs->obstack ()); |
927aa2e7 JK |
3361 | } |
3362 | ||
9291a0cd TT |
3363 | /* Find a slot in the mapped index INDEX for the object named NAME. |
3364 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
109483d9 PA |
3365 | constant pool and return true. If NAME cannot be found, return |
3366 | false. */ | |
2fdf6df6 | 3367 | |
109483d9 | 3368 | static bool |
9291a0cd TT |
3369 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, |
3370 | offset_type **vec_out) | |
3371 | { | |
0cf03b49 | 3372 | offset_type hash; |
9291a0cd | 3373 | offset_type slot, step; |
559a7a62 | 3374 | int (*cmp) (const char *, const char *); |
9291a0cd | 3375 | |
791afaa2 | 3376 | gdb::unique_xmalloc_ptr<char> without_params; |
0cf03b49 | 3377 | if (current_language->la_language == language_cplus |
45280282 IB |
3378 | || current_language->la_language == language_fortran |
3379 | || current_language->la_language == language_d) | |
0cf03b49 JK |
3380 | { |
3381 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
3382 | not contain any. */ | |
a8719064 | 3383 | |
72998fb3 | 3384 | if (strchr (name, '(') != NULL) |
0cf03b49 | 3385 | { |
109483d9 | 3386 | without_params = cp_remove_params (name); |
0cf03b49 | 3387 | |
72998fb3 | 3388 | if (without_params != NULL) |
791afaa2 | 3389 | name = without_params.get (); |
0cf03b49 JK |
3390 | } |
3391 | } | |
3392 | ||
559a7a62 | 3393 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 3394 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
3395 | simulate our NAME being searched is also lowercased. */ |
3396 | hash = mapped_index_string_hash ((index->version == 4 | |
3397 | && case_sensitivity == case_sensitive_off | |
3398 | ? 5 : index->version), | |
3399 | name); | |
3400 | ||
f00a2de2 PA |
3401 | slot = hash & (index->symbol_table.size () - 1); |
3402 | step = ((hash * 17) & (index->symbol_table.size () - 1)) | 1; | |
559a7a62 | 3403 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
3404 | |
3405 | for (;;) | |
3406 | { | |
9291a0cd | 3407 | const char *str; |
f00a2de2 PA |
3408 | |
3409 | const auto &bucket = index->symbol_table[slot]; | |
3410 | if (bucket.name == 0 && bucket.vec == 0) | |
109483d9 | 3411 | return false; |
9291a0cd | 3412 | |
f00a2de2 | 3413 | str = index->constant_pool + MAYBE_SWAP (bucket.name); |
559a7a62 | 3414 | if (!cmp (name, str)) |
9291a0cd TT |
3415 | { |
3416 | *vec_out = (offset_type *) (index->constant_pool | |
f00a2de2 | 3417 | + MAYBE_SWAP (bucket.vec)); |
109483d9 | 3418 | return true; |
9291a0cd TT |
3419 | } |
3420 | ||
f00a2de2 | 3421 | slot = (slot + step) & (index->symbol_table.size () - 1); |
9291a0cd TT |
3422 | } |
3423 | } | |
3424 | ||
4485a1c1 SM |
3425 | /* A helper function that reads the .gdb_index from BUFFER and fills |
3426 | in MAP. FILENAME is the name of the file containing the data; | |
d33bc52e | 3427 | it is used for error reporting. DEPRECATED_OK is true if it is |
2ec9a5e0 TT |
3428 | ok to use deprecated sections. |
3429 | ||
3430 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
3431 | out parameters that are filled in with information about the CU and | |
3432 | TU lists in the section. | |
3433 | ||
4485a1c1 | 3434 | Returns true if all went well, false otherwise. */ |
2fdf6df6 | 3435 | |
d33bc52e | 3436 | static bool |
4485a1c1 SM |
3437 | read_gdb_index_from_buffer (struct objfile *objfile, |
3438 | const char *filename, | |
3439 | bool deprecated_ok, | |
3440 | gdb::array_view<const gdb_byte> buffer, | |
3441 | struct mapped_index *map, | |
3442 | const gdb_byte **cu_list, | |
3443 | offset_type *cu_list_elements, | |
3444 | const gdb_byte **types_list, | |
3445 | offset_type *types_list_elements) | |
3446 | { | |
3447 | const gdb_byte *addr = &buffer[0]; | |
82430852 | 3448 | |
9291a0cd | 3449 | /* Version check. */ |
4485a1c1 | 3450 | offset_type version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 3451 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 3452 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 3453 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 3454 | indices. */ |
831adc1f | 3455 | if (version < 4) |
481860b3 GB |
3456 | { |
3457 | static int warning_printed = 0; | |
3458 | if (!warning_printed) | |
3459 | { | |
3460 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 3461 | filename); |
481860b3 GB |
3462 | warning_printed = 1; |
3463 | } | |
3464 | return 0; | |
3465 | } | |
3466 | /* Index version 4 uses a different hash function than index version | |
3467 | 5 and later. | |
3468 | ||
3469 | Versions earlier than 6 did not emit psymbols for inlined | |
3470 | functions. Using these files will cause GDB not to be able to | |
3471 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
3472 | indices unless the user has done |
3473 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 3474 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
3475 | { |
3476 | static int warning_printed = 0; | |
3477 | if (!warning_printed) | |
3478 | { | |
e615022a DE |
3479 | warning (_("\ |
3480 | Skipping deprecated .gdb_index section in %s.\n\ | |
3481 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
3482 | to use the section anyway."), | |
2ec9a5e0 | 3483 | filename); |
481860b3 GB |
3484 | warning_printed = 1; |
3485 | } | |
3486 | return 0; | |
3487 | } | |
796a7ff8 | 3488 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
3489 | of the TU (for symbols coming from TUs), |
3490 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
3491 | Plus gold-generated indices can have duplicate entries for global symbols, | |
3492 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
3493 | These are just performance bugs, and we can't distinguish gdb-generated | |
3494 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 3495 | |
481860b3 | 3496 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 3497 | longer backward compatible. */ |
796a7ff8 | 3498 | if (version > 8) |
594e8718 | 3499 | return 0; |
9291a0cd | 3500 | |
559a7a62 | 3501 | map->version = version; |
9291a0cd | 3502 | |
4485a1c1 | 3503 | offset_type *metadata = (offset_type *) (addr + sizeof (offset_type)); |
1fd400ff | 3504 | |
4485a1c1 | 3505 | int i = 0; |
2ec9a5e0 TT |
3506 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
3507 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
3508 | / 8); | |
1fd400ff TT |
3509 | ++i; |
3510 | ||
2ec9a5e0 TT |
3511 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
3512 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
3513 | - MAYBE_SWAP (metadata[i])) | |
3514 | / 8); | |
987d643c | 3515 | ++i; |
1fd400ff | 3516 | |
f00a2de2 PA |
3517 | const gdb_byte *address_table = addr + MAYBE_SWAP (metadata[i]); |
3518 | const gdb_byte *address_table_end = addr + MAYBE_SWAP (metadata[i + 1]); | |
3519 | map->address_table | |
3520 | = gdb::array_view<const gdb_byte> (address_table, address_table_end); | |
1fd400ff TT |
3521 | ++i; |
3522 | ||
f00a2de2 PA |
3523 | const gdb_byte *symbol_table = addr + MAYBE_SWAP (metadata[i]); |
3524 | const gdb_byte *symbol_table_end = addr + MAYBE_SWAP (metadata[i + 1]); | |
3525 | map->symbol_table | |
3526 | = gdb::array_view<mapped_index::symbol_table_slot> | |
3527 | ((mapped_index::symbol_table_slot *) symbol_table, | |
3528 | (mapped_index::symbol_table_slot *) symbol_table_end); | |
9291a0cd | 3529 | |
f00a2de2 | 3530 | ++i; |
f9d83a0b | 3531 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 3532 | |
2ec9a5e0 TT |
3533 | return 1; |
3534 | } | |
3535 | ||
4485a1c1 SM |
3536 | /* Callback types for dwarf2_read_gdb_index. */ |
3537 | ||
3538 | typedef gdb::function_view | |
3539 | <gdb::array_view<const gdb_byte>(objfile *, dwarf2_per_objfile *)> | |
3540 | get_gdb_index_contents_ftype; | |
3541 | typedef gdb::function_view | |
3542 | <gdb::array_view<const gdb_byte>(objfile *, dwz_file *)> | |
3543 | get_gdb_index_contents_dwz_ftype; | |
3544 | ||
927aa2e7 | 3545 | /* Read .gdb_index. If everything went ok, initialize the "quick" |
2ec9a5e0 TT |
3546 | elements of all the CUs and return 1. Otherwise, return 0. */ |
3547 | ||
3548 | static int | |
4485a1c1 SM |
3549 | dwarf2_read_gdb_index |
3550 | (struct dwarf2_per_objfile *dwarf2_per_objfile, | |
3551 | get_gdb_index_contents_ftype get_gdb_index_contents, | |
3552 | get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz) | |
2ec9a5e0 | 3553 | { |
2ec9a5e0 TT |
3554 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; |
3555 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 3556 | struct dwz_file *dwz; |
12359b5e | 3557 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ec9a5e0 | 3558 | |
4485a1c1 SM |
3559 | gdb::array_view<const gdb_byte> main_index_contents |
3560 | = get_gdb_index_contents (objfile, dwarf2_per_objfile); | |
3561 | ||
3562 | if (main_index_contents.empty ()) | |
3563 | return 0; | |
3564 | ||
3063847f | 3565 | std::unique_ptr<struct mapped_index> map (new struct mapped_index); |
4485a1c1 SM |
3566 | if (!read_gdb_index_from_buffer (objfile, objfile_name (objfile), |
3567 | use_deprecated_index_sections, | |
3568 | main_index_contents, map.get (), &cu_list, | |
3569 | &cu_list_elements, &types_list, | |
3570 | &types_list_elements)) | |
2ec9a5e0 TT |
3571 | return 0; |
3572 | ||
0fefef59 | 3573 | /* Don't use the index if it's empty. */ |
3063847f | 3574 | if (map->symbol_table.empty ()) |
0fefef59 DE |
3575 | return 0; |
3576 | ||
2ec9a5e0 TT |
3577 | /* If there is a .dwz file, read it so we can get its CU list as |
3578 | well. */ | |
ed2dc618 | 3579 | dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
4db1a1dc | 3580 | if (dwz != NULL) |
2ec9a5e0 | 3581 | { |
2ec9a5e0 TT |
3582 | struct mapped_index dwz_map; |
3583 | const gdb_byte *dwz_types_ignore; | |
3584 | offset_type dwz_types_elements_ignore; | |
3585 | ||
4485a1c1 SM |
3586 | gdb::array_view<const gdb_byte> dwz_index_content |
3587 | = get_gdb_index_contents_dwz (objfile, dwz); | |
3588 | ||
3589 | if (dwz_index_content.empty ()) | |
3590 | return 0; | |
3591 | ||
3592 | if (!read_gdb_index_from_buffer (objfile, | |
00f93c44 AM |
3593 | bfd_get_filename (dwz->dwz_bfd.get ()), |
3594 | 1, dwz_index_content, &dwz_map, | |
4485a1c1 SM |
3595 | &dwz_list, &dwz_list_elements, |
3596 | &dwz_types_ignore, | |
3597 | &dwz_types_elements_ignore)) | |
2ec9a5e0 TT |
3598 | { |
3599 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
00f93c44 | 3600 | bfd_get_filename (dwz->dwz_bfd.get ())); |
2ec9a5e0 TT |
3601 | return 0; |
3602 | } | |
3603 | } | |
3604 | ||
12359b5e SM |
3605 | create_cus_from_index (dwarf2_per_objfile, cu_list, cu_list_elements, |
3606 | dwz_list, dwz_list_elements); | |
1fd400ff | 3607 | |
8b70b953 TT |
3608 | if (types_list_elements) |
3609 | { | |
8b70b953 TT |
3610 | /* We can only handle a single .debug_types when we have an |
3611 | index. */ | |
fd5866f6 | 3612 | if (dwarf2_per_objfile->types.size () != 1) |
8b70b953 TT |
3613 | return 0; |
3614 | ||
fd5866f6 | 3615 | dwarf2_section_info *section = &dwarf2_per_objfile->types[0]; |
8b70b953 | 3616 | |
12359b5e SM |
3617 | create_signatured_type_table_from_index (dwarf2_per_objfile, section, |
3618 | types_list, types_list_elements); | |
8b70b953 | 3619 | } |
9291a0cd | 3620 | |
3063847f | 3621 | create_addrmap_from_index (dwarf2_per_objfile, map.get ()); |
9291a0cd | 3622 | |
3063847f | 3623 | dwarf2_per_objfile->index_table = std::move (map); |
9291a0cd | 3624 | dwarf2_per_objfile->using_index = 1; |
7b9f3c50 | 3625 | dwarf2_per_objfile->quick_file_names_table = |
b76e467d | 3626 | create_quick_file_names_table (dwarf2_per_objfile->all_comp_units.size ()); |
9291a0cd TT |
3627 | |
3628 | return 1; | |
3629 | } | |
3630 | ||
dee91e82 | 3631 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 3632 | |
dee91e82 DE |
3633 | static void |
3634 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3635 | const gdb_byte *info_ptr, |
dee91e82 DE |
3636 | struct die_info *comp_unit_die, |
3637 | int has_children, | |
3638 | void *data) | |
9291a0cd | 3639 | { |
dee91e82 | 3640 | struct dwarf2_cu *cu = reader->cu; |
ed2dc618 | 3641 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; |
518817b3 SM |
3642 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3643 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 3644 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
094b34ac | 3645 | struct dwarf2_per_cu_data *lh_cu; |
9291a0cd | 3646 | struct attribute *attr; |
dee91e82 | 3647 | int i; |
7b9f3c50 DE |
3648 | void **slot; |
3649 | struct quick_file_names *qfn; | |
9291a0cd | 3650 | |
0186c6a7 DE |
3651 | gdb_assert (! this_cu->is_debug_types); |
3652 | ||
07261596 TT |
3653 | /* Our callers never want to match partial units -- instead they |
3654 | will match the enclosing full CU. */ | |
3655 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3656 | { | |
3657 | this_cu->v.quick->no_file_data = 1; | |
3658 | return; | |
3659 | } | |
3660 | ||
0186c6a7 | 3661 | lh_cu = this_cu; |
7b9f3c50 | 3662 | slot = NULL; |
dee91e82 | 3663 | |
fff8551c | 3664 | line_header_up lh; |
9c541725 | 3665 | sect_offset line_offset {}; |
fff8551c | 3666 | |
dee91e82 | 3667 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); |
9291a0cd TT |
3668 | if (attr) |
3669 | { | |
7b9f3c50 DE |
3670 | struct quick_file_names find_entry; |
3671 | ||
9c541725 | 3672 | line_offset = (sect_offset) DW_UNSND (attr); |
7b9f3c50 DE |
3673 | |
3674 | /* We may have already read in this line header (TU line header sharing). | |
3675 | If we have we're done. */ | |
094b34ac | 3676 | find_entry.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3677 | find_entry.hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3678 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
3679 | &find_entry, INSERT); | |
3680 | if (*slot != NULL) | |
3681 | { | |
9a3c8263 | 3682 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
dee91e82 | 3683 | return; |
7b9f3c50 DE |
3684 | } |
3685 | ||
3019eac3 | 3686 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3687 | } |
3688 | if (lh == NULL) | |
3689 | { | |
094b34ac | 3690 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3691 | return; |
9291a0cd TT |
3692 | } |
3693 | ||
8d749320 | 3694 | qfn = XOBNEW (&objfile->objfile_obstack, struct quick_file_names); |
094b34ac | 3695 | qfn->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3696 | qfn->hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3697 | gdb_assert (slot != NULL); |
3698 | *slot = qfn; | |
9291a0cd | 3699 | |
d721ba37 | 3700 | file_and_directory fnd = find_file_and_directory (comp_unit_die, cu); |
9291a0cd | 3701 | |
aa391654 TT |
3702 | int offset = 0; |
3703 | if (strcmp (fnd.name, "<unknown>") != 0) | |
3704 | ++offset; | |
3705 | ||
3706 | qfn->num_file_names = offset + lh->file_names.size (); | |
8d749320 | 3707 | qfn->file_names = |
aa391654 TT |
3708 | XOBNEWVEC (&objfile->objfile_obstack, const char *, qfn->num_file_names); |
3709 | if (offset != 0) | |
3710 | qfn->file_names[0] = xstrdup (fnd.name); | |
fff8551c | 3711 | for (i = 0; i < lh->file_names.size (); ++i) |
aa391654 | 3712 | qfn->file_names[i + offset] = file_full_name (i + 1, lh.get (), fnd.comp_dir); |
7b9f3c50 | 3713 | qfn->real_names = NULL; |
9291a0cd | 3714 | |
094b34ac | 3715 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3716 | } |
3717 | ||
3718 | /* A helper for the "quick" functions which attempts to read the line | |
3719 | table for THIS_CU. */ | |
3720 | ||
3721 | static struct quick_file_names * | |
e4a48d9d | 3722 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3723 | { |
0186c6a7 DE |
3724 | /* This should never be called for TUs. */ |
3725 | gdb_assert (! this_cu->is_debug_types); | |
3726 | /* Nor type unit groups. */ | |
3727 | gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu)); | |
f4dc4d17 | 3728 | |
dee91e82 DE |
3729 | if (this_cu->v.quick->file_names != NULL) |
3730 | return this_cu->v.quick->file_names; | |
3731 | /* If we know there is no line data, no point in looking again. */ | |
3732 | if (this_cu->v.quick->no_file_data) | |
3733 | return NULL; | |
3734 | ||
0186c6a7 | 3735 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); |
dee91e82 DE |
3736 | |
3737 | if (this_cu->v.quick->no_file_data) | |
3738 | return NULL; | |
3739 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3740 | } |
3741 | ||
3742 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3743 | real path for a given file name from the line table. */ |
2fdf6df6 | 3744 | |
9291a0cd | 3745 | static const char * |
7b9f3c50 DE |
3746 | dw2_get_real_path (struct objfile *objfile, |
3747 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3748 | { |
7b9f3c50 DE |
3749 | if (qfn->real_names == NULL) |
3750 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
26f2dc30 | 3751 | qfn->num_file_names, const char *); |
9291a0cd | 3752 | |
7b9f3c50 | 3753 | if (qfn->real_names[index] == NULL) |
14278e1f | 3754 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]).release (); |
9291a0cd | 3755 | |
7b9f3c50 | 3756 | return qfn->real_names[index]; |
9291a0cd TT |
3757 | } |
3758 | ||
3759 | static struct symtab * | |
3760 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3761 | { | |
ed2dc618 SM |
3762 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3763 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 3764 | dwarf2_per_cu_data *dwarf_cu = dwarf2_per_objfile->all_comp_units.back (); |
58f0c718 | 3765 | compunit_symtab *cust = dw2_instantiate_symtab (dwarf_cu, false); |
ae2de4f8 | 3766 | |
43f3e411 DE |
3767 | if (cust == NULL) |
3768 | return NULL; | |
ed2dc618 | 3769 | |
43f3e411 | 3770 | return compunit_primary_filetab (cust); |
9291a0cd TT |
3771 | } |
3772 | ||
7b9f3c50 DE |
3773 | /* Traversal function for dw2_forget_cached_source_info. */ |
3774 | ||
3775 | static int | |
3776 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3777 | { |
7b9f3c50 | 3778 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3779 | |
7b9f3c50 | 3780 | if (file_data->real_names) |
9291a0cd | 3781 | { |
7b9f3c50 | 3782 | int i; |
9291a0cd | 3783 | |
7b9f3c50 | 3784 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3785 | { |
7b9f3c50 DE |
3786 | xfree ((void*) file_data->real_names[i]); |
3787 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3788 | } |
3789 | } | |
7b9f3c50 DE |
3790 | |
3791 | return 1; | |
3792 | } | |
3793 | ||
3794 | static void | |
3795 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3796 | { | |
ed2dc618 SM |
3797 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3798 | = get_dwarf2_per_objfile (objfile); | |
7b9f3c50 DE |
3799 | |
3800 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
3801 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
3802 | } |
3803 | ||
f8eba3c6 TT |
3804 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3805 | the symtabs and calls the iterator. */ | |
3806 | ||
3807 | static int | |
3808 | dw2_map_expand_apply (struct objfile *objfile, | |
3809 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3810 | const char *name, const char *real_path, |
14bc53a8 | 3811 | gdb::function_view<bool (symtab *)> callback) |
f8eba3c6 | 3812 | { |
43f3e411 | 3813 | struct compunit_symtab *last_made = objfile->compunit_symtabs; |
f8eba3c6 TT |
3814 | |
3815 | /* Don't visit already-expanded CUs. */ | |
43f3e411 | 3816 | if (per_cu->v.quick->compunit_symtab) |
f8eba3c6 TT |
3817 | return 0; |
3818 | ||
3819 | /* This may expand more than one symtab, and we want to iterate over | |
3820 | all of them. */ | |
58f0c718 | 3821 | dw2_instantiate_symtab (per_cu, false); |
f8eba3c6 | 3822 | |
14bc53a8 PA |
3823 | return iterate_over_some_symtabs (name, real_path, objfile->compunit_symtabs, |
3824 | last_made, callback); | |
f8eba3c6 TT |
3825 | } |
3826 | ||
3827 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3828 | ||
14bc53a8 PA |
3829 | static bool |
3830 | dw2_map_symtabs_matching_filename | |
3831 | (struct objfile *objfile, const char *name, const char *real_path, | |
3832 | gdb::function_view<bool (symtab *)> callback) | |
9291a0cd | 3833 | { |
c011a4f4 | 3834 | const char *name_basename = lbasename (name); |
ed2dc618 SM |
3835 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3836 | = get_dwarf2_per_objfile (objfile); | |
ae2de4f8 | 3837 | |
848e3e78 DE |
3838 | /* The rule is CUs specify all the files, including those used by |
3839 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3840 | |
b76e467d | 3841 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
9291a0cd | 3842 | { |
3d7bb9d9 | 3843 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3844 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3845 | continue; |
3846 | ||
b76e467d | 3847 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3848 | if (file_data == NULL) |
9291a0cd TT |
3849 | continue; |
3850 | ||
b76e467d | 3851 | for (int j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3852 | { |
7b9f3c50 | 3853 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3854 | const char *this_real_name; |
9291a0cd | 3855 | |
af529f8f | 3856 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3857 | { |
f5b95b50 | 3858 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3859 | callback)) |
3860 | return true; | |
288e77a7 | 3861 | continue; |
4aac40c8 | 3862 | } |
9291a0cd | 3863 | |
c011a4f4 DE |
3864 | /* Before we invoke realpath, which can get expensive when many |
3865 | files are involved, do a quick comparison of the basenames. */ | |
3866 | if (! basenames_may_differ | |
3867 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3868 | continue; | |
3869 | ||
da235a7c JK |
3870 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3871 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3872 | { |
da235a7c | 3873 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3874 | callback)) |
3875 | return true; | |
288e77a7 | 3876 | continue; |
da235a7c | 3877 | } |
9291a0cd | 3878 | |
da235a7c JK |
3879 | if (real_path != NULL) |
3880 | { | |
af529f8f JK |
3881 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3882 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3883 | if (this_real_name != NULL |
af529f8f | 3884 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3885 | { |
f5b95b50 | 3886 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3887 | callback)) |
3888 | return true; | |
288e77a7 | 3889 | continue; |
9291a0cd TT |
3890 | } |
3891 | } | |
3892 | } | |
3893 | } | |
3894 | ||
14bc53a8 | 3895 | return false; |
9291a0cd TT |
3896 | } |
3897 | ||
da51c347 DE |
3898 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3899 | ||
3900 | struct dw2_symtab_iterator | |
9291a0cd | 3901 | { |
ed2dc618 SM |
3902 | /* The dwarf2_per_objfile owning the CUs we are iterating on. */ |
3903 | struct dwarf2_per_objfile *dwarf2_per_objfile; | |
2b79f376 SM |
3904 | /* If set, only look for symbols that match that block. Valid values are |
3905 | GLOBAL_BLOCK and STATIC_BLOCK. */ | |
c7f839cb | 3906 | gdb::optional<block_enum> block_index; |
da51c347 DE |
3907 | /* The kind of symbol we're looking for. */ |
3908 | domain_enum domain; | |
3909 | /* The list of CUs from the index entry of the symbol, | |
3910 | or NULL if not found. */ | |
3911 | offset_type *vec; | |
3912 | /* The next element in VEC to look at. */ | |
3913 | int next; | |
3914 | /* The number of elements in VEC, or zero if there is no match. */ | |
3915 | int length; | |
8943b874 DE |
3916 | /* Have we seen a global version of the symbol? |
3917 | If so we can ignore all further global instances. | |
3918 | This is to work around gold/15646, inefficient gold-generated | |
3919 | indices. */ | |
3920 | int global_seen; | |
da51c347 | 3921 | }; |
9291a0cd | 3922 | |
2b79f376 | 3923 | /* Initialize the index symtab iterator ITER. */ |
2fdf6df6 | 3924 | |
9291a0cd | 3925 | static void |
da51c347 | 3926 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
ed2dc618 | 3927 | struct dwarf2_per_objfile *dwarf2_per_objfile, |
c7f839cb | 3928 | gdb::optional<block_enum> block_index, |
da51c347 DE |
3929 | domain_enum domain, |
3930 | const char *name) | |
3931 | { | |
ed2dc618 | 3932 | iter->dwarf2_per_objfile = dwarf2_per_objfile; |
da51c347 DE |
3933 | iter->block_index = block_index; |
3934 | iter->domain = domain; | |
3935 | iter->next = 0; | |
8943b874 | 3936 | iter->global_seen = 0; |
da51c347 | 3937 | |
3063847f | 3938 | mapped_index *index = dwarf2_per_objfile->index_table.get (); |
ed2dc618 SM |
3939 | |
3940 | /* index is NULL if OBJF_READNOW. */ | |
3941 | if (index != NULL && find_slot_in_mapped_hash (index, name, &iter->vec)) | |
da51c347 DE |
3942 | iter->length = MAYBE_SWAP (*iter->vec); |
3943 | else | |
3944 | { | |
3945 | iter->vec = NULL; | |
3946 | iter->length = 0; | |
3947 | } | |
3948 | } | |
3949 | ||
3950 | /* Return the next matching CU or NULL if there are no more. */ | |
3951 | ||
3952 | static struct dwarf2_per_cu_data * | |
3953 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3954 | { | |
ed2dc618 SM |
3955 | struct dwarf2_per_objfile *dwarf2_per_objfile = iter->dwarf2_per_objfile; |
3956 | ||
da51c347 DE |
3957 | for ( ; iter->next < iter->length; ++iter->next) |
3958 | { | |
3959 | offset_type cu_index_and_attrs = | |
3960 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3961 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
da51c347 DE |
3962 | gdb_index_symbol_kind symbol_kind = |
3963 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3964 | /* Only check the symbol attributes if they're present. | |
3965 | Indices prior to version 7 don't record them, | |
3966 | and indices >= 7 may elide them for certain symbols | |
3967 | (gold does this). */ | |
3968 | int attrs_valid = | |
ed2dc618 | 3969 | (dwarf2_per_objfile->index_table->version >= 7 |
da51c347 DE |
3970 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); |
3971 | ||
3190f0c6 | 3972 | /* Don't crash on bad data. */ |
b76e467d | 3973 | if (cu_index >= (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 3974 | + dwarf2_per_objfile->all_type_units.size ())) |
3190f0c6 | 3975 | { |
b98664d3 | 3976 | complaint (_(".gdb_index entry has bad CU index" |
4262abfb JK |
3977 | " [in module %s]"), |
3978 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
3979 | continue; |
3980 | } | |
3981 | ||
ff4c9fec | 3982 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (cu_index); |
3190f0c6 | 3983 | |
da51c347 | 3984 | /* Skip if already read in. */ |
43f3e411 | 3985 | if (per_cu->v.quick->compunit_symtab) |
da51c347 DE |
3986 | continue; |
3987 | ||
8943b874 DE |
3988 | /* Check static vs global. */ |
3989 | if (attrs_valid) | |
3990 | { | |
2b79f376 SM |
3991 | bool is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); |
3992 | ||
3993 | if (iter->block_index.has_value ()) | |
3994 | { | |
3995 | bool want_static = *iter->block_index == STATIC_BLOCK; | |
3996 | ||
3997 | if (is_static != want_static) | |
3998 | continue; | |
3999 | } | |
4000 | ||
8943b874 DE |
4001 | /* Work around gold/15646. */ |
4002 | if (!is_static && iter->global_seen) | |
4003 | continue; | |
4004 | if (!is_static) | |
4005 | iter->global_seen = 1; | |
4006 | } | |
da51c347 DE |
4007 | |
4008 | /* Only check the symbol's kind if it has one. */ | |
4009 | if (attrs_valid) | |
4010 | { | |
4011 | switch (iter->domain) | |
4012 | { | |
4013 | case VAR_DOMAIN: | |
4014 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
4015 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
4016 | /* Some types are also in VAR_DOMAIN. */ | |
4017 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4018 | continue; | |
4019 | break; | |
4020 | case STRUCT_DOMAIN: | |
4021 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4022 | continue; | |
4023 | break; | |
4024 | case LABEL_DOMAIN: | |
4025 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
4026 | continue; | |
4027 | break; | |
4028 | default: | |
4029 | break; | |
4030 | } | |
4031 | } | |
4032 | ||
4033 | ++iter->next; | |
4034 | return per_cu; | |
4035 | } | |
4036 | ||
4037 | return NULL; | |
4038 | } | |
4039 | ||
43f3e411 | 4040 | static struct compunit_symtab * |
c7f839cb | 4041 | dw2_lookup_symbol (struct objfile *objfile, block_enum block_index, |
da51c347 | 4042 | const char *name, domain_enum domain) |
9291a0cd | 4043 | { |
43f3e411 | 4044 | struct compunit_symtab *stab_best = NULL; |
ed2dc618 SM |
4045 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4046 | = get_dwarf2_per_objfile (objfile); | |
9291a0cd | 4047 | |
b5ec771e PA |
4048 | lookup_name_info lookup_name (name, symbol_name_match_type::FULL); |
4049 | ||
ed2dc618 SM |
4050 | struct dw2_symtab_iterator iter; |
4051 | struct dwarf2_per_cu_data *per_cu; | |
da51c347 | 4052 | |
2b79f376 | 4053 | dw2_symtab_iter_init (&iter, dwarf2_per_objfile, block_index, domain, name); |
9291a0cd | 4054 | |
ed2dc618 SM |
4055 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
4056 | { | |
4057 | struct symbol *sym, *with_opaque = NULL; | |
58f0c718 | 4058 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu, false); |
ed2dc618 | 4059 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); |
582942f4 | 4060 | const struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
da51c347 | 4061 | |
ed2dc618 SM |
4062 | sym = block_find_symbol (block, name, domain, |
4063 | block_find_non_opaque_type_preferred, | |
4064 | &with_opaque); | |
b2e2f908 | 4065 | |
ed2dc618 SM |
4066 | /* Some caution must be observed with overloaded functions |
4067 | and methods, since the index will not contain any overload | |
4068 | information (but NAME might contain it). */ | |
da51c347 | 4069 | |
ed2dc618 SM |
4070 | if (sym != NULL |
4071 | && SYMBOL_MATCHES_SEARCH_NAME (sym, lookup_name)) | |
4072 | return stab; | |
4073 | if (with_opaque != NULL | |
4074 | && SYMBOL_MATCHES_SEARCH_NAME (with_opaque, lookup_name)) | |
4075 | stab_best = stab; | |
da51c347 | 4076 | |
ed2dc618 | 4077 | /* Keep looking through other CUs. */ |
9291a0cd | 4078 | } |
9291a0cd | 4079 | |
da51c347 | 4080 | return stab_best; |
9291a0cd TT |
4081 | } |
4082 | ||
4083 | static void | |
4084 | dw2_print_stats (struct objfile *objfile) | |
4085 | { | |
ed2dc618 SM |
4086 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4087 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 4088 | int total = (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 4089 | + dwarf2_per_objfile->all_type_units.size ()); |
ed2dc618 | 4090 | int count = 0; |
9291a0cd | 4091 | |
ed2dc618 | 4092 | for (int i = 0; i < total; ++i) |
9291a0cd | 4093 | { |
ff4c9fec | 4094 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 4095 | |
43f3e411 | 4096 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
4097 | ++count; |
4098 | } | |
e4a48d9d | 4099 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
4100 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
4101 | } | |
4102 | ||
779bd270 DE |
4103 | /* This dumps minimal information about the index. |
4104 | It is called via "mt print objfiles". | |
4105 | One use is to verify .gdb_index has been loaded by the | |
4106 | gdb.dwarf2/gdb-index.exp testcase. */ | |
4107 | ||
9291a0cd TT |
4108 | static void |
4109 | dw2_dump (struct objfile *objfile) | |
4110 | { | |
ed2dc618 SM |
4111 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4112 | = get_dwarf2_per_objfile (objfile); | |
4113 | ||
779bd270 DE |
4114 | gdb_assert (dwarf2_per_objfile->using_index); |
4115 | printf_filtered (".gdb_index:"); | |
4116 | if (dwarf2_per_objfile->index_table != NULL) | |
4117 | { | |
4118 | printf_filtered (" version %d\n", | |
4119 | dwarf2_per_objfile->index_table->version); | |
4120 | } | |
4121 | else | |
4122 | printf_filtered (" faked for \"readnow\"\n"); | |
4123 | printf_filtered ("\n"); | |
9291a0cd TT |
4124 | } |
4125 | ||
9291a0cd TT |
4126 | static void |
4127 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
4128 | const char *func_name) | |
4129 | { | |
ed2dc618 SM |
4130 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4131 | = get_dwarf2_per_objfile (objfile); | |
da51c347 | 4132 | |
ed2dc618 SM |
4133 | struct dw2_symtab_iterator iter; |
4134 | struct dwarf2_per_cu_data *per_cu; | |
da51c347 | 4135 | |
2b79f376 | 4136 | dw2_symtab_iter_init (&iter, dwarf2_per_objfile, {}, VAR_DOMAIN, func_name); |
da51c347 | 4137 | |
ed2dc618 | 4138 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
58f0c718 | 4139 | dw2_instantiate_symtab (per_cu, false); |
da51c347 | 4140 | |
9291a0cd TT |
4141 | } |
4142 | ||
4143 | static void | |
4144 | dw2_expand_all_symtabs (struct objfile *objfile) | |
4145 | { | |
ed2dc618 SM |
4146 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4147 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 4148 | int total_units = (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 4149 | + dwarf2_per_objfile->all_type_units.size ()); |
9291a0cd | 4150 | |
ed2dc618 | 4151 | for (int i = 0; i < total_units; ++i) |
9291a0cd | 4152 | { |
ff4c9fec | 4153 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 4154 | |
58f0c718 TT |
4155 | /* We don't want to directly expand a partial CU, because if we |
4156 | read it with the wrong language, then assertion failures can | |
4157 | be triggered later on. See PR symtab/23010. So, tell | |
4158 | dw2_instantiate_symtab to skip partial CUs -- any important | |
4159 | partial CU will be read via DW_TAG_imported_unit anyway. */ | |
4160 | dw2_instantiate_symtab (per_cu, true); | |
9291a0cd TT |
4161 | } |
4162 | } | |
4163 | ||
4164 | static void | |
652a8996 JK |
4165 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
4166 | const char *fullname) | |
9291a0cd | 4167 | { |
ed2dc618 SM |
4168 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4169 | = get_dwarf2_per_objfile (objfile); | |
d4637a04 DE |
4170 | |
4171 | /* We don't need to consider type units here. | |
4172 | This is only called for examining code, e.g. expand_line_sal. | |
4173 | There can be an order of magnitude (or more) more type units | |
4174 | than comp units, and we avoid them if we can. */ | |
4175 | ||
b76e467d | 4176 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
9291a0cd | 4177 | { |
3d7bb9d9 | 4178 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 4179 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
4180 | continue; |
4181 | ||
b76e467d | 4182 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 4183 | if (file_data == NULL) |
9291a0cd TT |
4184 | continue; |
4185 | ||
b76e467d | 4186 | for (int j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 4187 | { |
652a8996 JK |
4188 | const char *this_fullname = file_data->file_names[j]; |
4189 | ||
4190 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 4191 | { |
58f0c718 | 4192 | dw2_instantiate_symtab (per_cu, false); |
9291a0cd TT |
4193 | break; |
4194 | } | |
4195 | } | |
4196 | } | |
4197 | } | |
4198 | ||
9291a0cd | 4199 | static void |
199b4314 TT |
4200 | dw2_map_matching_symbols |
4201 | (struct objfile *objfile, | |
b054970d | 4202 | const lookup_name_info &name, domain_enum domain, |
199b4314 TT |
4203 | int global, |
4204 | gdb::function_view<symbol_found_callback_ftype> callback, | |
199b4314 | 4205 | symbol_compare_ftype *ordered_compare) |
9291a0cd | 4206 | { |
40658b94 | 4207 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
4208 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
4209 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
4210 | } |
4211 | ||
e1ef7d7a PA |
4212 | /* Starting from a search name, return the string that finds the upper |
4213 | bound of all strings that start with SEARCH_NAME in a sorted name | |
4214 | list. Returns the empty string to indicate that the upper bound is | |
4215 | the end of the list. */ | |
4216 | ||
4217 | static std::string | |
4218 | make_sort_after_prefix_name (const char *search_name) | |
4219 | { | |
4220 | /* When looking to complete "func", we find the upper bound of all | |
4221 | symbols that start with "func" by looking for where we'd insert | |
4222 | the closest string that would follow "func" in lexicographical | |
4223 | order. Usually, that's "func"-with-last-character-incremented, | |
4224 | i.e. "fund". Mind non-ASCII characters, though. Usually those | |
4225 | will be UTF-8 multi-byte sequences, but we can't be certain. | |
4226 | Especially mind the 0xff character, which is a valid character in | |
4227 | non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't | |
4228 | rule out compilers allowing it in identifiers. Note that | |
4229 | conveniently, strcmp/strcasecmp are specified to compare | |
4230 | characters interpreted as unsigned char. So what we do is treat | |
4231 | the whole string as a base 256 number composed of a sequence of | |
4232 | base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps | |
4233 | to 0, and carries 1 to the following more-significant position. | |
4234 | If the very first character in SEARCH_NAME ends up incremented | |
4235 | and carries/overflows, then the upper bound is the end of the | |
4236 | list. The string after the empty string is also the empty | |
4237 | string. | |
4238 | ||
4239 | Some examples of this operation: | |
4240 | ||
4241 | SEARCH_NAME => "+1" RESULT | |
4242 | ||
4243 | "abc" => "abd" | |
4244 | "ab\xff" => "ac" | |
4245 | "\xff" "a" "\xff" => "\xff" "b" | |
4246 | "\xff" => "" | |
4247 | "\xff\xff" => "" | |
4248 | "" => "" | |
4249 | ||
4250 | Then, with these symbols for example: | |
4251 | ||
4252 | func | |
4253 | func1 | |
4254 | fund | |
4255 | ||
4256 | completing "func" looks for symbols between "func" and | |
4257 | "func"-with-last-character-incremented, i.e. "fund" (exclusive), | |
4258 | which finds "func" and "func1", but not "fund". | |
4259 | ||
4260 | And with: | |
4261 | ||
4262 | funcÿ (Latin1 'ÿ' [0xff]) | |
4263 | funcÿ1 | |
4264 | fund | |
4265 | ||
4266 | completing "funcÿ" looks for symbols between "funcÿ" and "fund" | |
4267 | (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund". | |
4268 | ||
4269 | And with: | |
4270 | ||
4271 | ÿÿ (Latin1 'ÿ' [0xff]) | |
4272 | ÿÿ1 | |
4273 | ||
4274 | completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and | |
4275 | the end of the list. | |
4276 | */ | |
4277 | std::string after = search_name; | |
4278 | while (!after.empty () && (unsigned char) after.back () == 0xff) | |
4279 | after.pop_back (); | |
4280 | if (!after.empty ()) | |
4281 | after.back () = (unsigned char) after.back () + 1; | |
4282 | return after; | |
4283 | } | |
4284 | ||
5c58de74 | 4285 | /* See declaration. */ |
61d96d7e | 4286 | |
5c58de74 PA |
4287 | std::pair<std::vector<name_component>::const_iterator, |
4288 | std::vector<name_component>::const_iterator> | |
44ed8f3e | 4289 | mapped_index_base::find_name_components_bounds |
3b00ef10 | 4290 | (const lookup_name_info &lookup_name_without_params, language lang) const |
3f563c84 | 4291 | { |
5c58de74 PA |
4292 | auto *name_cmp |
4293 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
3f563c84 | 4294 | |
3b00ef10 TT |
4295 | const char *lang_name |
4296 | = lookup_name_without_params.language_lookup_name (lang).c_str (); | |
9291a0cd | 4297 | |
3f563c84 PA |
4298 | /* Comparison function object for lower_bound that matches against a |
4299 | given symbol name. */ | |
4300 | auto lookup_compare_lower = [&] (const name_component &elem, | |
4301 | const char *name) | |
4302 | { | |
5c58de74 | 4303 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
4304 | const char *elem_name = elem_qualified + elem.name_offset; |
4305 | return name_cmp (elem_name, name) < 0; | |
4306 | }; | |
4307 | ||
4308 | /* Comparison function object for upper_bound that matches against a | |
4309 | given symbol name. */ | |
4310 | auto lookup_compare_upper = [&] (const char *name, | |
4311 | const name_component &elem) | |
4312 | { | |
5c58de74 | 4313 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
4314 | const char *elem_name = elem_qualified + elem.name_offset; |
4315 | return name_cmp (name, elem_name) < 0; | |
4316 | }; | |
4317 | ||
5c58de74 PA |
4318 | auto begin = this->name_components.begin (); |
4319 | auto end = this->name_components.end (); | |
3f563c84 PA |
4320 | |
4321 | /* Find the lower bound. */ | |
4322 | auto lower = [&] () | |
4323 | { | |
3b00ef10 | 4324 | if (lookup_name_without_params.completion_mode () && lang_name[0] == '\0') |
3f563c84 PA |
4325 | return begin; |
4326 | else | |
3b00ef10 | 4327 | return std::lower_bound (begin, end, lang_name, lookup_compare_lower); |
3f563c84 PA |
4328 | } (); |
4329 | ||
4330 | /* Find the upper bound. */ | |
4331 | auto upper = [&] () | |
4332 | { | |
5c58de74 | 4333 | if (lookup_name_without_params.completion_mode ()) |
3f563c84 | 4334 | { |
e1ef7d7a PA |
4335 | /* In completion mode, we want UPPER to point past all |
4336 | symbols names that have the same prefix. I.e., with | |
4337 | these symbols, and completing "func": | |
4338 | ||
4339 | function << lower bound | |
4340 | function1 | |
4341 | other_function << upper bound | |
4342 | ||
4343 | We find the upper bound by looking for the insertion | |
4344 | point of "func"-with-last-character-incremented, | |
4345 | i.e. "fund". */ | |
3b00ef10 | 4346 | std::string after = make_sort_after_prefix_name (lang_name); |
e1ef7d7a | 4347 | if (after.empty ()) |
3f563c84 | 4348 | return end; |
e6b2f5ef PA |
4349 | return std::lower_bound (lower, end, after.c_str (), |
4350 | lookup_compare_lower); | |
3f563c84 PA |
4351 | } |
4352 | else | |
3b00ef10 | 4353 | return std::upper_bound (lower, end, lang_name, lookup_compare_upper); |
3f563c84 PA |
4354 | } (); |
4355 | ||
5c58de74 PA |
4356 | return {lower, upper}; |
4357 | } | |
4358 | ||
4359 | /* See declaration. */ | |
4360 | ||
4361 | void | |
44ed8f3e | 4362 | mapped_index_base::build_name_components () |
5c58de74 PA |
4363 | { |
4364 | if (!this->name_components.empty ()) | |
4365 | return; | |
4366 | ||
4367 | this->name_components_casing = case_sensitivity; | |
4368 | auto *name_cmp | |
4369 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
4370 | ||
4371 | /* The code below only knows how to break apart components of C++ | |
4372 | symbol names (and other languages that use '::' as | |
3b00ef10 | 4373 | namespace/module separator) and Ada symbol names. */ |
44ed8f3e PA |
4374 | auto count = this->symbol_name_count (); |
4375 | for (offset_type idx = 0; idx < count; idx++) | |
5c58de74 | 4376 | { |
44ed8f3e | 4377 | if (this->symbol_name_slot_invalid (idx)) |
5c58de74 PA |
4378 | continue; |
4379 | ||
4380 | const char *name = this->symbol_name_at (idx); | |
4381 | ||
4382 | /* Add each name component to the name component table. */ | |
4383 | unsigned int previous_len = 0; | |
3b00ef10 TT |
4384 | |
4385 | if (strstr (name, "::") != nullptr) | |
4386 | { | |
4387 | for (unsigned int current_len = cp_find_first_component (name); | |
4388 | name[current_len] != '\0'; | |
4389 | current_len += cp_find_first_component (name + current_len)) | |
4390 | { | |
4391 | gdb_assert (name[current_len] == ':'); | |
4392 | this->name_components.push_back ({previous_len, idx}); | |
4393 | /* Skip the '::'. */ | |
4394 | current_len += 2; | |
4395 | previous_len = current_len; | |
4396 | } | |
4397 | } | |
4398 | else | |
5c58de74 | 4399 | { |
3b00ef10 TT |
4400 | /* Handle the Ada encoded (aka mangled) form here. */ |
4401 | for (const char *iter = strstr (name, "__"); | |
4402 | iter != nullptr; | |
4403 | iter = strstr (iter, "__")) | |
4404 | { | |
4405 | this->name_components.push_back ({previous_len, idx}); | |
4406 | iter += 2; | |
4407 | previous_len = iter - name; | |
4408 | } | |
5c58de74 | 4409 | } |
3b00ef10 | 4410 | |
5c58de74 PA |
4411 | this->name_components.push_back ({previous_len, idx}); |
4412 | } | |
4413 | ||
4414 | /* Sort name_components elements by name. */ | |
4415 | auto name_comp_compare = [&] (const name_component &left, | |
4416 | const name_component &right) | |
4417 | { | |
4418 | const char *left_qualified = this->symbol_name_at (left.idx); | |
4419 | const char *right_qualified = this->symbol_name_at (right.idx); | |
4420 | ||
4421 | const char *left_name = left_qualified + left.name_offset; | |
4422 | const char *right_name = right_qualified + right.name_offset; | |
4423 | ||
4424 | return name_cmp (left_name, right_name) < 0; | |
4425 | }; | |
4426 | ||
4427 | std::sort (this->name_components.begin (), | |
4428 | this->name_components.end (), | |
4429 | name_comp_compare); | |
4430 | } | |
4431 | ||
4432 | /* Helper for dw2_expand_symtabs_matching that works with a | |
44ed8f3e PA |
4433 | mapped_index_base instead of the containing objfile. This is split |
4434 | to a separate function in order to be able to unit test the | |
4435 | name_components matching using a mock mapped_index_base. For each | |
5c58de74 | 4436 | symbol name that matches, calls MATCH_CALLBACK, passing it the |
44ed8f3e | 4437 | symbol's index in the mapped_index_base symbol table. */ |
5c58de74 PA |
4438 | |
4439 | static void | |
4440 | dw2_expand_symtabs_matching_symbol | |
44ed8f3e | 4441 | (mapped_index_base &index, |
5c58de74 PA |
4442 | const lookup_name_info &lookup_name_in, |
4443 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
4444 | enum search_domain kind, | |
3b00ef10 | 4445 | gdb::function_view<bool (offset_type)> match_callback) |
5c58de74 PA |
4446 | { |
4447 | lookup_name_info lookup_name_without_params | |
4448 | = lookup_name_in.make_ignore_params (); | |
5c58de74 PA |
4449 | |
4450 | /* Build the symbol name component sorted vector, if we haven't | |
4451 | yet. */ | |
4452 | index.build_name_components (); | |
4453 | ||
3f563c84 PA |
4454 | /* The same symbol may appear more than once in the range though. |
4455 | E.g., if we're looking for symbols that complete "w", and we have | |
4456 | a symbol named "w1::w2", we'll find the two name components for | |
4457 | that same symbol in the range. To be sure we only call the | |
4458 | callback once per symbol, we first collect the symbol name | |
4459 | indexes that matched in a temporary vector and ignore | |
4460 | duplicates. */ | |
4461 | std::vector<offset_type> matches; | |
3f563c84 | 4462 | |
3b00ef10 TT |
4463 | struct name_and_matcher |
4464 | { | |
4465 | symbol_name_matcher_ftype *matcher; | |
4466 | const std::string &name; | |
4467 | ||
4468 | bool operator== (const name_and_matcher &other) const | |
3f563c84 | 4469 | { |
3b00ef10 TT |
4470 | return matcher == other.matcher && name == other.name; |
4471 | } | |
4472 | }; | |
4473 | ||
4474 | /* A vector holding all the different symbol name matchers, for all | |
4475 | languages. */ | |
4476 | std::vector<name_and_matcher> matchers; | |
4477 | ||
4478 | for (int i = 0; i < nr_languages; i++) | |
4479 | { | |
4480 | enum language lang_e = (enum language) i; | |
4481 | ||
4482 | const language_defn *lang = language_def (lang_e); | |
4483 | symbol_name_matcher_ftype *name_matcher | |
4484 | = get_symbol_name_matcher (lang, lookup_name_without_params); | |
3f563c84 | 4485 | |
3b00ef10 TT |
4486 | name_and_matcher key { |
4487 | name_matcher, | |
4488 | lookup_name_without_params.language_lookup_name (lang_e) | |
4489 | }; | |
4490 | ||
4491 | /* Don't insert the same comparison routine more than once. | |
4492 | Note that we do this linear walk. This is not a problem in | |
4493 | practice because the number of supported languages is | |
4494 | low. */ | |
4495 | if (std::find (matchers.begin (), matchers.end (), key) | |
4496 | != matchers.end ()) | |
9291a0cd | 4497 | continue; |
3b00ef10 TT |
4498 | matchers.push_back (std::move (key)); |
4499 | ||
4500 | auto bounds | |
4501 | = index.find_name_components_bounds (lookup_name_without_params, | |
4502 | lang_e); | |
4503 | ||
4504 | /* Now for each symbol name in range, check to see if we have a name | |
4505 | match, and if so, call the MATCH_CALLBACK callback. */ | |
4506 | ||
4507 | for (; bounds.first != bounds.second; ++bounds.first) | |
4508 | { | |
4509 | const char *qualified = index.symbol_name_at (bounds.first->idx); | |
4510 | ||
4511 | if (!name_matcher (qualified, lookup_name_without_params, NULL) | |
4512 | || (symbol_matcher != NULL && !symbol_matcher (qualified))) | |
4513 | continue; | |
9291a0cd | 4514 | |
3b00ef10 TT |
4515 | matches.push_back (bounds.first->idx); |
4516 | } | |
3f563c84 PA |
4517 | } |
4518 | ||
4519 | std::sort (matches.begin (), matches.end ()); | |
4520 | ||
4521 | /* Finally call the callback, once per match. */ | |
4522 | ULONGEST prev = -1; | |
4523 | for (offset_type idx : matches) | |
4524 | { | |
4525 | if (prev != idx) | |
4526 | { | |
3b00ef10 TT |
4527 | if (!match_callback (idx)) |
4528 | break; | |
3f563c84 PA |
4529 | prev = idx; |
4530 | } | |
4531 | } | |
4532 | ||
4533 | /* Above we use a type wider than idx's for 'prev', since 0 and | |
4534 | (offset_type)-1 are both possible values. */ | |
4535 | static_assert (sizeof (prev) > sizeof (offset_type), ""); | |
4536 | } | |
4537 | ||
c62446b1 PA |
4538 | #if GDB_SELF_TEST |
4539 | ||
4540 | namespace selftests { namespace dw2_expand_symtabs_matching { | |
4541 | ||
a3c5fafd PA |
4542 | /* A mock .gdb_index/.debug_names-like name index table, enough to |
4543 | exercise dw2_expand_symtabs_matching_symbol, which works with the | |
4544 | mapped_index_base interface. Builds an index from the symbol list | |
4545 | passed as parameter to the constructor. */ | |
4546 | class mock_mapped_index : public mapped_index_base | |
c62446b1 PA |
4547 | { |
4548 | public: | |
a3c5fafd PA |
4549 | mock_mapped_index (gdb::array_view<const char *> symbols) |
4550 | : m_symbol_table (symbols) | |
c62446b1 PA |
4551 | {} |
4552 | ||
a3c5fafd | 4553 | DISABLE_COPY_AND_ASSIGN (mock_mapped_index); |
c62446b1 | 4554 | |
a3c5fafd | 4555 | /* Return the number of names in the symbol table. */ |
632e107b | 4556 | size_t symbol_name_count () const override |
c62446b1 | 4557 | { |
a3c5fafd | 4558 | return m_symbol_table.size (); |
c62446b1 PA |
4559 | } |
4560 | ||
a3c5fafd | 4561 | /* Get the name of the symbol at IDX in the symbol table. */ |
632e107b | 4562 | const char *symbol_name_at (offset_type idx) const override |
a3c5fafd PA |
4563 | { |
4564 | return m_symbol_table[idx]; | |
4565 | } | |
c62446b1 | 4566 | |
a3c5fafd PA |
4567 | private: |
4568 | gdb::array_view<const char *> m_symbol_table; | |
c62446b1 PA |
4569 | }; |
4570 | ||
4571 | /* Convenience function that converts a NULL pointer to a "<null>" | |
4572 | string, to pass to print routines. */ | |
4573 | ||
4574 | static const char * | |
4575 | string_or_null (const char *str) | |
4576 | { | |
4577 | return str != NULL ? str : "<null>"; | |
4578 | } | |
4579 | ||
4580 | /* Check if a lookup_name_info built from | |
4581 | NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock | |
4582 | index. EXPECTED_LIST is the list of expected matches, in expected | |
4583 | matching order. If no match expected, then an empty list is | |
4584 | specified. Returns true on success. On failure prints a warning | |
4585 | indicating the file:line that failed, and returns false. */ | |
4586 | ||
4587 | static bool | |
4588 | check_match (const char *file, int line, | |
4589 | mock_mapped_index &mock_index, | |
4590 | const char *name, symbol_name_match_type match_type, | |
4591 | bool completion_mode, | |
4592 | std::initializer_list<const char *> expected_list) | |
4593 | { | |
4594 | lookup_name_info lookup_name (name, match_type, completion_mode); | |
4595 | ||
4596 | bool matched = true; | |
4597 | ||
4598 | auto mismatch = [&] (const char *expected_str, | |
4599 | const char *got) | |
4600 | { | |
4601 | warning (_("%s:%d: match_type=%s, looking-for=\"%s\", " | |
4602 | "expected=\"%s\", got=\"%s\"\n"), | |
4603 | file, line, | |
4604 | (match_type == symbol_name_match_type::FULL | |
4605 | ? "FULL" : "WILD"), | |
4606 | name, string_or_null (expected_str), string_or_null (got)); | |
4607 | matched = false; | |
4608 | }; | |
4609 | ||
4610 | auto expected_it = expected_list.begin (); | |
4611 | auto expected_end = expected_list.end (); | |
4612 | ||
a3c5fafd | 4613 | dw2_expand_symtabs_matching_symbol (mock_index, lookup_name, |
c62446b1 PA |
4614 | NULL, ALL_DOMAIN, |
4615 | [&] (offset_type idx) | |
4616 | { | |
a3c5fafd | 4617 | const char *matched_name = mock_index.symbol_name_at (idx); |
c62446b1 PA |
4618 | const char *expected_str |
4619 | = expected_it == expected_end ? NULL : *expected_it++; | |
4620 | ||
4621 | if (expected_str == NULL || strcmp (expected_str, matched_name) != 0) | |
4622 | mismatch (expected_str, matched_name); | |
3b00ef10 | 4623 | return true; |
c62446b1 PA |
4624 | }); |
4625 | ||
4626 | const char *expected_str | |
4627 | = expected_it == expected_end ? NULL : *expected_it++; | |
4628 | if (expected_str != NULL) | |
4629 | mismatch (expected_str, NULL); | |
4630 | ||
4631 | return matched; | |
4632 | } | |
4633 | ||
4634 | /* The symbols added to the mock mapped_index for testing (in | |
4635 | canonical form). */ | |
4636 | static const char *test_symbols[] = { | |
4637 | "function", | |
4638 | "std::bar", | |
4639 | "std::zfunction", | |
4640 | "std::zfunction2", | |
4641 | "w1::w2", | |
4642 | "ns::foo<char*>", | |
4643 | "ns::foo<int>", | |
4644 | "ns::foo<long>", | |
a20714ff PA |
4645 | "ns2::tmpl<int>::foo2", |
4646 | "(anonymous namespace)::A::B::C", | |
c62446b1 | 4647 | |
e1ef7d7a PA |
4648 | /* These are used to check that the increment-last-char in the |
4649 | matching algorithm for completion doesn't match "t1_fund" when | |
4650 | completing "t1_func". */ | |
4651 | "t1_func", | |
4652 | "t1_func1", | |
4653 | "t1_fund", | |
4654 | "t1_fund1", | |
4655 | ||
4656 | /* A UTF-8 name with multi-byte sequences to make sure that | |
4657 | cp-name-parser understands this as a single identifier ("função" | |
4658 | is "function" in PT). */ | |
4659 | u8"u8função", | |
4660 | ||
4661 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4662 | "yfunc\377", | |
4663 | ||
4664 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4665 | "\377", | |
4666 | "\377\377123", | |
4667 | ||
c62446b1 PA |
4668 | /* A name with all sorts of complications. Starts with "z" to make |
4669 | it easier for the completion tests below. */ | |
4670 | #define Z_SYM_NAME \ | |
4671 | "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \ | |
4672 | "::tuple<(anonymous namespace)::ui*, " \ | |
4673 | "std::default_delete<(anonymous namespace)::ui>, void>" | |
4674 | ||
4675 | Z_SYM_NAME | |
4676 | }; | |
4677 | ||
a3c5fafd PA |
4678 | /* Returns true if the mapped_index_base::find_name_component_bounds |
4679 | method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME, | |
4680 | in completion mode. */ | |
5c58de74 PA |
4681 | |
4682 | static bool | |
a3c5fafd | 4683 | check_find_bounds_finds (mapped_index_base &index, |
5c58de74 PA |
4684 | const char *search_name, |
4685 | gdb::array_view<const char *> expected_syms) | |
4686 | { | |
4687 | lookup_name_info lookup_name (search_name, | |
4688 | symbol_name_match_type::FULL, true); | |
4689 | ||
3b00ef10 TT |
4690 | auto bounds = index.find_name_components_bounds (lookup_name, |
4691 | language_cplus); | |
5c58de74 PA |
4692 | |
4693 | size_t distance = std::distance (bounds.first, bounds.second); | |
4694 | if (distance != expected_syms.size ()) | |
4695 | return false; | |
4696 | ||
4697 | for (size_t exp_elem = 0; exp_elem < distance; exp_elem++) | |
4698 | { | |
4699 | auto nc_elem = bounds.first + exp_elem; | |
4700 | const char *qualified = index.symbol_name_at (nc_elem->idx); | |
4701 | if (strcmp (qualified, expected_syms[exp_elem]) != 0) | |
4702 | return false; | |
4703 | } | |
4704 | ||
4705 | return true; | |
4706 | } | |
4707 | ||
4708 | /* Test the lower-level mapped_index::find_name_component_bounds | |
4709 | method. */ | |
4710 | ||
c62446b1 | 4711 | static void |
5c58de74 PA |
4712 | test_mapped_index_find_name_component_bounds () |
4713 | { | |
4714 | mock_mapped_index mock_index (test_symbols); | |
4715 | ||
a3c5fafd | 4716 | mock_index.build_name_components (); |
5c58de74 PA |
4717 | |
4718 | /* Test the lower-level mapped_index::find_name_component_bounds | |
4719 | method in completion mode. */ | |
4720 | { | |
4721 | static const char *expected_syms[] = { | |
4722 | "t1_func", | |
4723 | "t1_func1", | |
5c58de74 PA |
4724 | }; |
4725 | ||
a3c5fafd | 4726 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4727 | "t1_func", expected_syms)); |
4728 | } | |
4729 | ||
4730 | /* Check that the increment-last-char in the name matching algorithm | |
4731 | for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */ | |
4732 | { | |
4733 | static const char *expected_syms1[] = { | |
4734 | "\377", | |
4735 | "\377\377123", | |
4736 | }; | |
a3c5fafd | 4737 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4738 | "\377", expected_syms1)); |
4739 | ||
4740 | static const char *expected_syms2[] = { | |
4741 | "\377\377123", | |
4742 | }; | |
a3c5fafd | 4743 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4744 | "\377\377", expected_syms2)); |
4745 | } | |
4746 | } | |
4747 | ||
4748 | /* Test dw2_expand_symtabs_matching_symbol. */ | |
4749 | ||
4750 | static void | |
4751 | test_dw2_expand_symtabs_matching_symbol () | |
c62446b1 PA |
4752 | { |
4753 | mock_mapped_index mock_index (test_symbols); | |
4754 | ||
4755 | /* We let all tests run until the end even if some fails, for debug | |
4756 | convenience. */ | |
4757 | bool any_mismatch = false; | |
4758 | ||
4759 | /* Create the expected symbols list (an initializer_list). Needed | |
4760 | because lists have commas, and we need to pass them to CHECK, | |
4761 | which is a macro. */ | |
4762 | #define EXPECT(...) { __VA_ARGS__ } | |
4763 | ||
4764 | /* Wrapper for check_match that passes down the current | |
4765 | __FILE__/__LINE__. */ | |
4766 | #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \ | |
4767 | any_mismatch |= !check_match (__FILE__, __LINE__, \ | |
4768 | mock_index, \ | |
4769 | NAME, MATCH_TYPE, COMPLETION_MODE, \ | |
4770 | EXPECTED_LIST) | |
4771 | ||
4772 | /* Identity checks. */ | |
4773 | for (const char *sym : test_symbols) | |
4774 | { | |
4775 | /* Should be able to match all existing symbols. */ | |
4776 | CHECK_MATCH (sym, symbol_name_match_type::FULL, false, | |
4777 | EXPECT (sym)); | |
4778 | ||
4779 | /* Should be able to match all existing symbols with | |
4780 | parameters. */ | |
4781 | std::string with_params = std::string (sym) + "(int)"; | |
4782 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4783 | EXPECT (sym)); | |
4784 | ||
4785 | /* Should be able to match all existing symbols with | |
4786 | parameters and qualifiers. */ | |
4787 | with_params = std::string (sym) + " ( int ) const"; | |
4788 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4789 | EXPECT (sym)); | |
4790 | ||
4791 | /* This should really find sym, but cp-name-parser.y doesn't | |
4792 | know about lvalue/rvalue qualifiers yet. */ | |
4793 | with_params = std::string (sym) + " ( int ) &&"; | |
4794 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4795 | {}); | |
4796 | } | |
4797 | ||
e1ef7d7a PA |
4798 | /* Check that the name matching algorithm for completion doesn't get |
4799 | confused with Latin1 'ÿ' / 0xff. */ | |
4800 | { | |
4801 | static const char str[] = "\377"; | |
4802 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
4803 | EXPECT ("\377", "\377\377123")); | |
4804 | } | |
4805 | ||
4806 | /* Check that the increment-last-char in the matching algorithm for | |
4807 | completion doesn't match "t1_fund" when completing "t1_func". */ | |
4808 | { | |
4809 | static const char str[] = "t1_func"; | |
4810 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
4811 | EXPECT ("t1_func", "t1_func1")); | |
4812 | } | |
4813 | ||
c62446b1 PA |
4814 | /* Check that completion mode works at each prefix of the expected |
4815 | symbol name. */ | |
4816 | { | |
4817 | static const char str[] = "function(int)"; | |
4818 | size_t len = strlen (str); | |
4819 | std::string lookup; | |
4820 | ||
4821 | for (size_t i = 1; i < len; i++) | |
4822 | { | |
4823 | lookup.assign (str, i); | |
4824 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4825 | EXPECT ("function")); | |
4826 | } | |
4827 | } | |
4828 | ||
4829 | /* While "w" is a prefix of both components, the match function | |
4830 | should still only be called once. */ | |
4831 | { | |
4832 | CHECK_MATCH ("w", symbol_name_match_type::FULL, true, | |
4833 | EXPECT ("w1::w2")); | |
a20714ff PA |
4834 | CHECK_MATCH ("w", symbol_name_match_type::WILD, true, |
4835 | EXPECT ("w1::w2")); | |
c62446b1 PA |
4836 | } |
4837 | ||
4838 | /* Same, with a "complicated" symbol. */ | |
4839 | { | |
4840 | static const char str[] = Z_SYM_NAME; | |
4841 | size_t len = strlen (str); | |
4842 | std::string lookup; | |
4843 | ||
4844 | for (size_t i = 1; i < len; i++) | |
4845 | { | |
4846 | lookup.assign (str, i); | |
4847 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4848 | EXPECT (Z_SYM_NAME)); | |
4849 | } | |
4850 | } | |
4851 | ||
4852 | /* In FULL mode, an incomplete symbol doesn't match. */ | |
4853 | { | |
4854 | CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL, false, | |
4855 | {}); | |
4856 | } | |
4857 | ||
4858 | /* A complete symbol with parameters matches any overload, since the | |
4859 | index has no overload info. */ | |
4860 | { | |
4861 | CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL, true, | |
4862 | EXPECT ("std::zfunction", "std::zfunction2")); | |
a20714ff PA |
4863 | CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD, true, |
4864 | EXPECT ("std::zfunction", "std::zfunction2")); | |
4865 | CHECK_MATCH ("zfunc", symbol_name_match_type::WILD, true, | |
4866 | EXPECT ("std::zfunction", "std::zfunction2")); | |
c62446b1 PA |
4867 | } |
4868 | ||
4869 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4870 | template argument list. */ | |
4871 | { | |
4872 | static const char expected[] = "ns::foo<int>"; | |
4873 | CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL, false, | |
4874 | EXPECT (expected)); | |
a20714ff PA |
4875 | CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD, false, |
4876 | EXPECT (expected)); | |
c62446b1 PA |
4877 | } |
4878 | ||
4879 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4880 | template argument list that includes a pointer. */ | |
4881 | { | |
4882 | static const char expected[] = "ns::foo<char*>"; | |
4883 | /* Try both completion and non-completion modes. */ | |
4884 | static const bool completion_mode[2] = {false, true}; | |
4885 | for (size_t i = 0; i < 2; i++) | |
4886 | { | |
4887 | CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL, | |
4888 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4889 | CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD, |
4890 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4891 | |
4892 | CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL, | |
4893 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4894 | CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD, |
4895 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4896 | } |
4897 | } | |
4898 | ||
4899 | { | |
4900 | /* Check method qualifiers are ignored. */ | |
4901 | static const char expected[] = "ns::foo<char*>"; | |
4902 | CHECK_MATCH ("ns :: foo < char * > ( int ) const", | |
4903 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
4904 | CHECK_MATCH ("ns :: foo < char * > ( int ) &&", | |
4905 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
a20714ff PA |
4906 | CHECK_MATCH ("foo < char * > ( int ) const", |
4907 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
4908 | CHECK_MATCH ("foo < char * > ( int ) &&", | |
4909 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
c62446b1 PA |
4910 | } |
4911 | ||
4912 | /* Test lookup names that don't match anything. */ | |
4913 | { | |
a20714ff PA |
4914 | CHECK_MATCH ("bar2", symbol_name_match_type::WILD, false, |
4915 | {}); | |
4916 | ||
c62446b1 PA |
4917 | CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL, false, |
4918 | {}); | |
4919 | } | |
4920 | ||
a20714ff PA |
4921 | /* Some wild matching tests, exercising "(anonymous namespace)", |
4922 | which should not be confused with a parameter list. */ | |
4923 | { | |
4924 | static const char *syms[] = { | |
4925 | "A::B::C", | |
4926 | "B::C", | |
4927 | "C", | |
4928 | "A :: B :: C ( int )", | |
4929 | "B :: C ( int )", | |
4930 | "C ( int )", | |
4931 | }; | |
4932 | ||
4933 | for (const char *s : syms) | |
4934 | { | |
4935 | CHECK_MATCH (s, symbol_name_match_type::WILD, false, | |
4936 | EXPECT ("(anonymous namespace)::A::B::C")); | |
4937 | } | |
4938 | } | |
4939 | ||
4940 | { | |
4941 | static const char expected[] = "ns2::tmpl<int>::foo2"; | |
4942 | CHECK_MATCH ("tmp", symbol_name_match_type::WILD, true, | |
4943 | EXPECT (expected)); | |
4944 | CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD, true, | |
4945 | EXPECT (expected)); | |
4946 | } | |
4947 | ||
c62446b1 PA |
4948 | SELF_CHECK (!any_mismatch); |
4949 | ||
4950 | #undef EXPECT | |
4951 | #undef CHECK_MATCH | |
4952 | } | |
4953 | ||
5c58de74 PA |
4954 | static void |
4955 | run_test () | |
4956 | { | |
4957 | test_mapped_index_find_name_component_bounds (); | |
4958 | test_dw2_expand_symtabs_matching_symbol (); | |
4959 | } | |
4960 | ||
c62446b1 PA |
4961 | }} // namespace selftests::dw2_expand_symtabs_matching |
4962 | ||
4963 | #endif /* GDB_SELF_TEST */ | |
4964 | ||
4b514bc8 JK |
4965 | /* If FILE_MATCHER is NULL or if PER_CU has |
4966 | dwarf2_per_cu_quick_data::MARK set (see | |
4967 | dw_expand_symtabs_matching_file_matcher), expand the CU and call | |
4968 | EXPANSION_NOTIFY on it. */ | |
4969 | ||
4970 | static void | |
4971 | dw2_expand_symtabs_matching_one | |
4972 | (struct dwarf2_per_cu_data *per_cu, | |
4973 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
4974 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify) | |
4975 | { | |
4976 | if (file_matcher == NULL || per_cu->v.quick->mark) | |
4977 | { | |
4978 | bool symtab_was_null | |
4979 | = (per_cu->v.quick->compunit_symtab == NULL); | |
4980 | ||
58f0c718 | 4981 | dw2_instantiate_symtab (per_cu, false); |
4b514bc8 JK |
4982 | |
4983 | if (expansion_notify != NULL | |
4984 | && symtab_was_null | |
4985 | && per_cu->v.quick->compunit_symtab != NULL) | |
4986 | expansion_notify (per_cu->v.quick->compunit_symtab); | |
4987 | } | |
4988 | } | |
4989 | ||
3f563c84 PA |
4990 | /* Helper for dw2_expand_matching symtabs. Called on each symbol |
4991 | matched, to expand corresponding CUs that were marked. IDX is the | |
4992 | index of the symbol name that matched. */ | |
4993 | ||
4994 | static void | |
4995 | dw2_expand_marked_cus | |
ed2dc618 | 4996 | (struct dwarf2_per_objfile *dwarf2_per_objfile, offset_type idx, |
3f563c84 PA |
4997 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
4998 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
4999 | search_domain kind) | |
5000 | { | |
3f563c84 PA |
5001 | offset_type *vec, vec_len, vec_idx; |
5002 | bool global_seen = false; | |
ed2dc618 | 5003 | mapped_index &index = *dwarf2_per_objfile->index_table; |
3f563c84 | 5004 | |
61920122 | 5005 | vec = (offset_type *) (index.constant_pool |
f00a2de2 | 5006 | + MAYBE_SWAP (index.symbol_table[idx].vec)); |
61920122 PA |
5007 | vec_len = MAYBE_SWAP (vec[0]); |
5008 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
5009 | { | |
61920122 PA |
5010 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
5011 | /* This value is only valid for index versions >= 7. */ | |
5012 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
5013 | gdb_index_symbol_kind symbol_kind = | |
5014 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
5015 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
5016 | /* Only check the symbol attributes if they're present. | |
5017 | Indices prior to version 7 don't record them, | |
5018 | and indices >= 7 may elide them for certain symbols | |
5019 | (gold does this). */ | |
5020 | int attrs_valid = | |
5021 | (index.version >= 7 | |
5022 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
5023 | ||
5024 | /* Work around gold/15646. */ | |
5025 | if (attrs_valid) | |
9291a0cd | 5026 | { |
61920122 PA |
5027 | if (!is_static && global_seen) |
5028 | continue; | |
5029 | if (!is_static) | |
5030 | global_seen = true; | |
5031 | } | |
3190f0c6 | 5032 | |
61920122 PA |
5033 | /* Only check the symbol's kind if it has one. */ |
5034 | if (attrs_valid) | |
5035 | { | |
5036 | switch (kind) | |
8943b874 | 5037 | { |
61920122 PA |
5038 | case VARIABLES_DOMAIN: |
5039 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
5040 | continue; | |
5041 | break; | |
5042 | case FUNCTIONS_DOMAIN: | |
5043 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
8943b874 | 5044 | continue; |
61920122 PA |
5045 | break; |
5046 | case TYPES_DOMAIN: | |
5047 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
5048 | continue; | |
5049 | break; | |
5050 | default: | |
5051 | break; | |
8943b874 | 5052 | } |
61920122 | 5053 | } |
8943b874 | 5054 | |
61920122 | 5055 | /* Don't crash on bad data. */ |
b76e467d | 5056 | if (cu_index >= (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 5057 | + dwarf2_per_objfile->all_type_units.size ())) |
61920122 | 5058 | { |
b98664d3 | 5059 | complaint (_(".gdb_index entry has bad CU index" |
ed2dc618 SM |
5060 | " [in module %s]"), |
5061 | objfile_name (dwarf2_per_objfile->objfile)); | |
61920122 PA |
5062 | continue; |
5063 | } | |
5064 | ||
ff4c9fec | 5065 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (cu_index); |
4b514bc8 JK |
5066 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, |
5067 | expansion_notify); | |
61920122 PA |
5068 | } |
5069 | } | |
5070 | ||
4b514bc8 JK |
5071 | /* If FILE_MATCHER is non-NULL, set all the |
5072 | dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE | |
5073 | that match FILE_MATCHER. */ | |
5074 | ||
61920122 | 5075 | static void |
4b514bc8 | 5076 | dw_expand_symtabs_matching_file_matcher |
ed2dc618 SM |
5077 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
5078 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher) | |
61920122 | 5079 | { |
4b514bc8 | 5080 | if (file_matcher == NULL) |
61920122 PA |
5081 | return; |
5082 | ||
4b514bc8 JK |
5083 | objfile *const objfile = dwarf2_per_objfile->objfile; |
5084 | ||
5085 | htab_up visited_found (htab_create_alloc (10, htab_hash_pointer, | |
5086 | htab_eq_pointer, | |
5087 | NULL, xcalloc, xfree)); | |
5088 | htab_up visited_not_found (htab_create_alloc (10, htab_hash_pointer, | |
61920122 PA |
5089 | htab_eq_pointer, |
5090 | NULL, xcalloc, xfree)); | |
61920122 | 5091 | |
4b514bc8 JK |
5092 | /* The rule is CUs specify all the files, including those used by |
5093 | any TU, so there's no need to scan TUs here. */ | |
61920122 | 5094 | |
b76e467d | 5095 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 5096 | { |
927aa2e7 JK |
5097 | QUIT; |
5098 | ||
5099 | per_cu->v.quick->mark = 0; | |
5100 | ||
5101 | /* We only need to look at symtabs not already expanded. */ | |
5102 | if (per_cu->v.quick->compunit_symtab) | |
5103 | continue; | |
5104 | ||
b76e467d | 5105 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
927aa2e7 JK |
5106 | if (file_data == NULL) |
5107 | continue; | |
5108 | ||
5109 | if (htab_find (visited_not_found.get (), file_data) != NULL) | |
5110 | continue; | |
5111 | else if (htab_find (visited_found.get (), file_data) != NULL) | |
5112 | { | |
5113 | per_cu->v.quick->mark = 1; | |
5114 | continue; | |
5115 | } | |
5116 | ||
b76e467d | 5117 | for (int j = 0; j < file_data->num_file_names; ++j) |
927aa2e7 JK |
5118 | { |
5119 | const char *this_real_name; | |
5120 | ||
5121 | if (file_matcher (file_data->file_names[j], false)) | |
5122 | { | |
5123 | per_cu->v.quick->mark = 1; | |
5124 | break; | |
5125 | } | |
5126 | ||
5127 | /* Before we invoke realpath, which can get expensive when many | |
5128 | files are involved, do a quick comparison of the basenames. */ | |
5129 | if (!basenames_may_differ | |
5130 | && !file_matcher (lbasename (file_data->file_names[j]), | |
5131 | true)) | |
5132 | continue; | |
5133 | ||
5134 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
5135 | if (file_matcher (this_real_name, false)) | |
5136 | { | |
5137 | per_cu->v.quick->mark = 1; | |
5138 | break; | |
5139 | } | |
5140 | } | |
5141 | ||
b76e467d SM |
5142 | void **slot = htab_find_slot (per_cu->v.quick->mark |
5143 | ? visited_found.get () | |
5144 | : visited_not_found.get (), | |
5145 | file_data, INSERT); | |
927aa2e7 JK |
5146 | *slot = file_data; |
5147 | } | |
5148 | } | |
5149 | ||
5150 | static void | |
5151 | dw2_expand_symtabs_matching | |
5152 | (struct objfile *objfile, | |
5153 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
5154 | const lookup_name_info &lookup_name, | |
5155 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
5156 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
5157 | enum search_domain kind) | |
5158 | { | |
ed2dc618 SM |
5159 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5160 | = get_dwarf2_per_objfile (objfile); | |
927aa2e7 JK |
5161 | |
5162 | /* index_table is NULL if OBJF_READNOW. */ | |
5163 | if (!dwarf2_per_objfile->index_table) | |
5164 | return; | |
5165 | ||
ed2dc618 | 5166 | dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile, file_matcher); |
927aa2e7 JK |
5167 | |
5168 | mapped_index &index = *dwarf2_per_objfile->index_table; | |
5169 | ||
5170 | dw2_expand_symtabs_matching_symbol (index, lookup_name, | |
5171 | symbol_matcher, | |
5172 | kind, [&] (offset_type idx) | |
5173 | { | |
ed2dc618 | 5174 | dw2_expand_marked_cus (dwarf2_per_objfile, idx, file_matcher, |
927aa2e7 | 5175 | expansion_notify, kind); |
3b00ef10 | 5176 | return true; |
927aa2e7 JK |
5177 | }); |
5178 | } | |
5179 | ||
5180 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific | |
5181 | symtab. */ | |
5182 | ||
5183 | static struct compunit_symtab * | |
5184 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, | |
5185 | CORE_ADDR pc) | |
5186 | { | |
5187 | int i; | |
5188 | ||
5189 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL | |
5190 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) | |
5191 | return cust; | |
5192 | ||
5193 | if (cust->includes == NULL) | |
5194 | return NULL; | |
5195 | ||
5196 | for (i = 0; cust->includes[i]; ++i) | |
5197 | { | |
5198 | struct compunit_symtab *s = cust->includes[i]; | |
5199 | ||
5200 | s = recursively_find_pc_sect_compunit_symtab (s, pc); | |
5201 | if (s != NULL) | |
5202 | return s; | |
5203 | } | |
5204 | ||
5205 | return NULL; | |
5206 | } | |
5207 | ||
5208 | static struct compunit_symtab * | |
5209 | dw2_find_pc_sect_compunit_symtab (struct objfile *objfile, | |
5210 | struct bound_minimal_symbol msymbol, | |
5211 | CORE_ADDR pc, | |
5212 | struct obj_section *section, | |
5213 | int warn_if_readin) | |
5214 | { | |
5215 | struct dwarf2_per_cu_data *data; | |
5216 | struct compunit_symtab *result; | |
5217 | ||
d320c2b5 | 5218 | if (!objfile->partial_symtabs->psymtabs_addrmap) |
927aa2e7 JK |
5219 | return NULL; |
5220 | ||
79748972 TT |
5221 | CORE_ADDR baseaddr = ANOFFSET (objfile->section_offsets, |
5222 | SECT_OFF_TEXT (objfile)); | |
d320c2b5 TT |
5223 | data = (struct dwarf2_per_cu_data *) addrmap_find |
5224 | (objfile->partial_symtabs->psymtabs_addrmap, pc - baseaddr); | |
927aa2e7 JK |
5225 | if (!data) |
5226 | return NULL; | |
5227 | ||
5228 | if (warn_if_readin && data->v.quick->compunit_symtab) | |
5229 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), | |
5230 | paddress (get_objfile_arch (objfile), pc)); | |
5231 | ||
5232 | result | |
58f0c718 TT |
5233 | = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data, |
5234 | false), | |
927aa2e7 JK |
5235 | pc); |
5236 | gdb_assert (result != NULL); | |
5237 | return result; | |
5238 | } | |
5239 | ||
5240 | static void | |
5241 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, | |
5242 | void *data, int need_fullname) | |
5243 | { | |
ed2dc618 SM |
5244 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5245 | = get_dwarf2_per_objfile (objfile); | |
927aa2e7 JK |
5246 | |
5247 | if (!dwarf2_per_objfile->filenames_cache) | |
5248 | { | |
5249 | dwarf2_per_objfile->filenames_cache.emplace (); | |
5250 | ||
5251 | htab_up visited (htab_create_alloc (10, | |
5252 | htab_hash_pointer, htab_eq_pointer, | |
5253 | NULL, xcalloc, xfree)); | |
5254 | ||
5255 | /* The rule is CUs specify all the files, including those used | |
5256 | by any TU, so there's no need to scan TUs here. We can | |
5257 | ignore file names coming from already-expanded CUs. */ | |
5258 | ||
b76e467d | 5259 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 5260 | { |
927aa2e7 JK |
5261 | if (per_cu->v.quick->compunit_symtab) |
5262 | { | |
5263 | void **slot = htab_find_slot (visited.get (), | |
5264 | per_cu->v.quick->file_names, | |
5265 | INSERT); | |
5266 | ||
5267 | *slot = per_cu->v.quick->file_names; | |
5268 | } | |
5269 | } | |
5270 | ||
b76e467d | 5271 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 5272 | { |
927aa2e7 JK |
5273 | /* We only need to look at symtabs not already expanded. */ |
5274 | if (per_cu->v.quick->compunit_symtab) | |
5275 | continue; | |
5276 | ||
b76e467d | 5277 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
927aa2e7 JK |
5278 | if (file_data == NULL) |
5279 | continue; | |
5280 | ||
b76e467d | 5281 | void **slot = htab_find_slot (visited.get (), file_data, INSERT); |
927aa2e7 JK |
5282 | if (*slot) |
5283 | { | |
5284 | /* Already visited. */ | |
5285 | continue; | |
5286 | } | |
5287 | *slot = file_data; | |
5288 | ||
5289 | for (int j = 0; j < file_data->num_file_names; ++j) | |
5290 | { | |
5291 | const char *filename = file_data->file_names[j]; | |
5292 | dwarf2_per_objfile->filenames_cache->seen (filename); | |
5293 | } | |
5294 | } | |
5295 | } | |
5296 | ||
5297 | dwarf2_per_objfile->filenames_cache->traverse ([&] (const char *filename) | |
5298 | { | |
5299 | gdb::unique_xmalloc_ptr<char> this_real_name; | |
5300 | ||
5301 | if (need_fullname) | |
5302 | this_real_name = gdb_realpath (filename); | |
5303 | (*fun) (filename, this_real_name.get (), data); | |
5304 | }); | |
5305 | } | |
5306 | ||
5307 | static int | |
5308 | dw2_has_symbols (struct objfile *objfile) | |
5309 | { | |
5310 | return 1; | |
5311 | } | |
5312 | ||
5313 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
5314 | { | |
5315 | dw2_has_symbols, | |
5316 | dw2_find_last_source_symtab, | |
5317 | dw2_forget_cached_source_info, | |
5318 | dw2_map_symtabs_matching_filename, | |
5319 | dw2_lookup_symbol, | |
5320 | dw2_print_stats, | |
5321 | dw2_dump, | |
927aa2e7 JK |
5322 | dw2_expand_symtabs_for_function, |
5323 | dw2_expand_all_symtabs, | |
5324 | dw2_expand_symtabs_with_fullname, | |
5325 | dw2_map_matching_symbols, | |
5326 | dw2_expand_symtabs_matching, | |
5327 | dw2_find_pc_sect_compunit_symtab, | |
5328 | NULL, | |
5329 | dw2_map_symbol_filenames | |
5330 | }; | |
5331 | ||
5332 | /* DWARF-5 debug_names reader. */ | |
5333 | ||
5334 | /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */ | |
5335 | static const gdb_byte dwarf5_augmentation[] = { 'G', 'D', 'B', 0 }; | |
5336 | ||
5337 | /* A helper function that reads the .debug_names section in SECTION | |
5338 | and fills in MAP. FILENAME is the name of the file containing the | |
5339 | section; it is used for error reporting. | |
5340 | ||
5341 | Returns true if all went well, false otherwise. */ | |
5342 | ||
5343 | static bool | |
5344 | read_debug_names_from_section (struct objfile *objfile, | |
5345 | const char *filename, | |
5346 | struct dwarf2_section_info *section, | |
5347 | mapped_debug_names &map) | |
5348 | { | |
5349 | if (dwarf2_section_empty_p (section)) | |
5350 | return false; | |
5351 | ||
5352 | /* Older elfutils strip versions could keep the section in the main | |
5353 | executable while splitting it for the separate debug info file. */ | |
5354 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) | |
5355 | return false; | |
5356 | ||
5357 | dwarf2_read_section (objfile, section); | |
5358 | ||
5359 | map.dwarf5_byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
5360 | ||
5361 | const gdb_byte *addr = section->buffer; | |
5362 | ||
5363 | bfd *const abfd = get_section_bfd_owner (section); | |
5364 | ||
5365 | unsigned int bytes_read; | |
5366 | LONGEST length = read_initial_length (abfd, addr, &bytes_read); | |
5367 | addr += bytes_read; | |
5368 | ||
5369 | map.dwarf5_is_dwarf64 = bytes_read != 4; | |
5370 | map.offset_size = map.dwarf5_is_dwarf64 ? 8 : 4; | |
5371 | if (bytes_read + length != section->size) | |
5372 | { | |
5373 | /* There may be multiple per-CU indices. */ | |
5374 | warning (_("Section .debug_names in %s length %s does not match " | |
5375 | "section length %s, ignoring .debug_names."), | |
5376 | filename, plongest (bytes_read + length), | |
5377 | pulongest (section->size)); | |
5378 | return false; | |
5379 | } | |
5380 | ||
5381 | /* The version number. */ | |
5382 | uint16_t version = read_2_bytes (abfd, addr); | |
5383 | addr += 2; | |
5384 | if (version != 5) | |
5385 | { | |
5386 | warning (_("Section .debug_names in %s has unsupported version %d, " | |
5387 | "ignoring .debug_names."), | |
5388 | filename, version); | |
5389 | return false; | |
5390 | } | |
5391 | ||
5392 | /* Padding. */ | |
5393 | uint16_t padding = read_2_bytes (abfd, addr); | |
5394 | addr += 2; | |
5395 | if (padding != 0) | |
5396 | { | |
5397 | warning (_("Section .debug_names in %s has unsupported padding %d, " | |
5398 | "ignoring .debug_names."), | |
5399 | filename, padding); | |
5400 | return false; | |
5401 | } | |
5402 | ||
5403 | /* comp_unit_count - The number of CUs in the CU list. */ | |
5404 | map.cu_count = read_4_bytes (abfd, addr); | |
5405 | addr += 4; | |
5406 | ||
5407 | /* local_type_unit_count - The number of TUs in the local TU | |
5408 | list. */ | |
5409 | map.tu_count = read_4_bytes (abfd, addr); | |
5410 | addr += 4; | |
5411 | ||
5412 | /* foreign_type_unit_count - The number of TUs in the foreign TU | |
5413 | list. */ | |
5414 | uint32_t foreign_tu_count = read_4_bytes (abfd, addr); | |
5415 | addr += 4; | |
5416 | if (foreign_tu_count != 0) | |
5417 | { | |
5418 | warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, " | |
5419 | "ignoring .debug_names."), | |
5420 | filename, static_cast<unsigned long> (foreign_tu_count)); | |
5421 | return false; | |
5422 | } | |
5423 | ||
5424 | /* bucket_count - The number of hash buckets in the hash lookup | |
5425 | table. */ | |
5426 | map.bucket_count = read_4_bytes (abfd, addr); | |
5427 | addr += 4; | |
5428 | ||
5429 | /* name_count - The number of unique names in the index. */ | |
5430 | map.name_count = read_4_bytes (abfd, addr); | |
5431 | addr += 4; | |
5432 | ||
5433 | /* abbrev_table_size - The size in bytes of the abbreviations | |
5434 | table. */ | |
5435 | uint32_t abbrev_table_size = read_4_bytes (abfd, addr); | |
5436 | addr += 4; | |
5437 | ||
5438 | /* augmentation_string_size - The size in bytes of the augmentation | |
5439 | string. This value is rounded up to a multiple of 4. */ | |
5440 | uint32_t augmentation_string_size = read_4_bytes (abfd, addr); | |
5441 | addr += 4; | |
5442 | map.augmentation_is_gdb = ((augmentation_string_size | |
5443 | == sizeof (dwarf5_augmentation)) | |
5444 | && memcmp (addr, dwarf5_augmentation, | |
5445 | sizeof (dwarf5_augmentation)) == 0); | |
5446 | augmentation_string_size += (-augmentation_string_size) & 3; | |
5447 | addr += augmentation_string_size; | |
5448 | ||
5449 | /* List of CUs */ | |
5450 | map.cu_table_reordered = addr; | |
5451 | addr += map.cu_count * map.offset_size; | |
5452 | ||
5453 | /* List of Local TUs */ | |
5454 | map.tu_table_reordered = addr; | |
5455 | addr += map.tu_count * map.offset_size; | |
5456 | ||
5457 | /* Hash Lookup Table */ | |
5458 | map.bucket_table_reordered = reinterpret_cast<const uint32_t *> (addr); | |
5459 | addr += map.bucket_count * 4; | |
5460 | map.hash_table_reordered = reinterpret_cast<const uint32_t *> (addr); | |
5461 | addr += map.name_count * 4; | |
5462 | ||
5463 | /* Name Table */ | |
5464 | map.name_table_string_offs_reordered = addr; | |
5465 | addr += map.name_count * map.offset_size; | |
5466 | map.name_table_entry_offs_reordered = addr; | |
5467 | addr += map.name_count * map.offset_size; | |
5468 | ||
5469 | const gdb_byte *abbrev_table_start = addr; | |
5470 | for (;;) | |
5471 | { | |
927aa2e7 JK |
5472 | const ULONGEST index_num = read_unsigned_leb128 (abfd, addr, &bytes_read); |
5473 | addr += bytes_read; | |
5474 | if (index_num == 0) | |
5475 | break; | |
5476 | ||
5477 | const auto insertpair | |
5478 | = map.abbrev_map.emplace (index_num, mapped_debug_names::index_val ()); | |
5479 | if (!insertpair.second) | |
5480 | { | |
5481 | warning (_("Section .debug_names in %s has duplicate index %s, " | |
5482 | "ignoring .debug_names."), | |
5483 | filename, pulongest (index_num)); | |
5484 | return false; | |
5485 | } | |
5486 | mapped_debug_names::index_val &indexval = insertpair.first->second; | |
5487 | indexval.dwarf_tag = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
5488 | addr += bytes_read; | |
5489 | ||
5490 | for (;;) | |
5491 | { | |
5492 | mapped_debug_names::index_val::attr attr; | |
5493 | attr.dw_idx = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
5494 | addr += bytes_read; | |
5495 | attr.form = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
5496 | addr += bytes_read; | |
5497 | if (attr.form == DW_FORM_implicit_const) | |
5498 | { | |
5499 | attr.implicit_const = read_signed_leb128 (abfd, addr, | |
5500 | &bytes_read); | |
5501 | addr += bytes_read; | |
5502 | } | |
5503 | if (attr.dw_idx == 0 && attr.form == 0) | |
5504 | break; | |
5505 | indexval.attr_vec.push_back (std::move (attr)); | |
5506 | } | |
5507 | } | |
5508 | if (addr != abbrev_table_start + abbrev_table_size) | |
5509 | { | |
5510 | warning (_("Section .debug_names in %s has abbreviation_table " | |
47e3f474 TV |
5511 | "of size %s vs. written as %u, ignoring .debug_names."), |
5512 | filename, plongest (addr - abbrev_table_start), | |
5513 | abbrev_table_size); | |
927aa2e7 JK |
5514 | return false; |
5515 | } | |
5516 | map.entry_pool = addr; | |
5517 | ||
5518 | return true; | |
5519 | } | |
5520 | ||
5521 | /* A helper for create_cus_from_debug_names that handles the MAP's CU | |
5522 | list. */ | |
5523 | ||
5524 | static void | |
ed2dc618 | 5525 | create_cus_from_debug_names_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
5526 | const mapped_debug_names &map, |
5527 | dwarf2_section_info §ion, | |
b76e467d | 5528 | bool is_dwz) |
927aa2e7 JK |
5529 | { |
5530 | sect_offset sect_off_prev; | |
5531 | for (uint32_t i = 0; i <= map.cu_count; ++i) | |
5532 | { | |
5533 | sect_offset sect_off_next; | |
5534 | if (i < map.cu_count) | |
5535 | { | |
5536 | sect_off_next | |
5537 | = (sect_offset) (extract_unsigned_integer | |
5538 | (map.cu_table_reordered + i * map.offset_size, | |
5539 | map.offset_size, | |
5540 | map.dwarf5_byte_order)); | |
5541 | } | |
5542 | else | |
5543 | sect_off_next = (sect_offset) section.size; | |
5544 | if (i >= 1) | |
5545 | { | |
5546 | const ULONGEST length = sect_off_next - sect_off_prev; | |
b76e467d | 5547 | dwarf2_per_cu_data *per_cu |
ed2dc618 | 5548 | = create_cu_from_index_list (dwarf2_per_objfile, §ion, is_dwz, |
927aa2e7 | 5549 | sect_off_prev, length); |
b76e467d | 5550 | dwarf2_per_objfile->all_comp_units.push_back (per_cu); |
927aa2e7 JK |
5551 | } |
5552 | sect_off_prev = sect_off_next; | |
5553 | } | |
5554 | } | |
5555 | ||
5556 | /* Read the CU list from the mapped index, and use it to create all | |
ed2dc618 | 5557 | the CU objects for this dwarf2_per_objfile. */ |
927aa2e7 JK |
5558 | |
5559 | static void | |
ed2dc618 | 5560 | create_cus_from_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
5561 | const mapped_debug_names &map, |
5562 | const mapped_debug_names &dwz_map) | |
5563 | { | |
b76e467d SM |
5564 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
5565 | dwarf2_per_objfile->all_comp_units.reserve (map.cu_count + dwz_map.cu_count); | |
927aa2e7 | 5566 | |
ed2dc618 SM |
5567 | create_cus_from_debug_names_list (dwarf2_per_objfile, map, |
5568 | dwarf2_per_objfile->info, | |
b76e467d | 5569 | false /* is_dwz */); |
927aa2e7 JK |
5570 | |
5571 | if (dwz_map.cu_count == 0) | |
5572 | return; | |
5573 | ||
ed2dc618 SM |
5574 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
5575 | create_cus_from_debug_names_list (dwarf2_per_objfile, dwz_map, dwz->info, | |
b76e467d | 5576 | true /* is_dwz */); |
927aa2e7 JK |
5577 | } |
5578 | ||
5579 | /* Read .debug_names. If everything went ok, initialize the "quick" | |
5580 | elements of all the CUs and return true. Otherwise, return false. */ | |
5581 | ||
5582 | static bool | |
ed2dc618 | 5583 | dwarf2_read_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile) |
927aa2e7 | 5584 | { |
22ca247e TT |
5585 | std::unique_ptr<mapped_debug_names> map |
5586 | (new mapped_debug_names (dwarf2_per_objfile)); | |
ed2dc618 SM |
5587 | mapped_debug_names dwz_map (dwarf2_per_objfile); |
5588 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
927aa2e7 JK |
5589 | |
5590 | if (!read_debug_names_from_section (objfile, objfile_name (objfile), | |
5591 | &dwarf2_per_objfile->debug_names, | |
22ca247e | 5592 | *map)) |
927aa2e7 JK |
5593 | return false; |
5594 | ||
5595 | /* Don't use the index if it's empty. */ | |
22ca247e | 5596 | if (map->name_count == 0) |
927aa2e7 JK |
5597 | return false; |
5598 | ||
5599 | /* If there is a .dwz file, read it so we can get its CU list as | |
5600 | well. */ | |
ed2dc618 | 5601 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
927aa2e7 JK |
5602 | if (dwz != NULL) |
5603 | { | |
5604 | if (!read_debug_names_from_section (objfile, | |
00f93c44 | 5605 | bfd_get_filename (dwz->dwz_bfd.get ()), |
927aa2e7 JK |
5606 | &dwz->debug_names, dwz_map)) |
5607 | { | |
5608 | warning (_("could not read '.debug_names' section from %s; skipping"), | |
00f93c44 | 5609 | bfd_get_filename (dwz->dwz_bfd.get ())); |
927aa2e7 JK |
5610 | return false; |
5611 | } | |
5612 | } | |
5613 | ||
22ca247e | 5614 | create_cus_from_debug_names (dwarf2_per_objfile, *map, dwz_map); |
927aa2e7 | 5615 | |
22ca247e | 5616 | if (map->tu_count != 0) |
927aa2e7 JK |
5617 | { |
5618 | /* We can only handle a single .debug_types when we have an | |
5619 | index. */ | |
fd5866f6 | 5620 | if (dwarf2_per_objfile->types.size () != 1) |
927aa2e7 JK |
5621 | return false; |
5622 | ||
fd5866f6 | 5623 | dwarf2_section_info *section = &dwarf2_per_objfile->types[0]; |
927aa2e7 JK |
5624 | |
5625 | create_signatured_type_table_from_debug_names | |
22ca247e | 5626 | (dwarf2_per_objfile, *map, section, &dwarf2_per_objfile->abbrev); |
927aa2e7 JK |
5627 | } |
5628 | ||
ed2dc618 SM |
5629 | create_addrmap_from_aranges (dwarf2_per_objfile, |
5630 | &dwarf2_per_objfile->debug_aranges); | |
927aa2e7 | 5631 | |
22ca247e | 5632 | dwarf2_per_objfile->debug_names_table = std::move (map); |
927aa2e7 JK |
5633 | dwarf2_per_objfile->using_index = 1; |
5634 | dwarf2_per_objfile->quick_file_names_table = | |
b76e467d | 5635 | create_quick_file_names_table (dwarf2_per_objfile->all_comp_units.size ()); |
927aa2e7 JK |
5636 | |
5637 | return true; | |
5638 | } | |
5639 | ||
927aa2e7 JK |
5640 | /* Type used to manage iterating over all CUs looking for a symbol for |
5641 | .debug_names. */ | |
5642 | ||
5643 | class dw2_debug_names_iterator | |
5644 | { | |
5645 | public: | |
927aa2e7 | 5646 | dw2_debug_names_iterator (const mapped_debug_names &map, |
2b79f376 SM |
5647 | gdb::optional<block_enum> block_index, |
5648 | domain_enum domain, | |
927aa2e7 | 5649 | const char *name) |
2b79f376 | 5650 | : m_map (map), m_block_index (block_index), m_domain (domain), |
927aa2e7 JK |
5651 | m_addr (find_vec_in_debug_names (map, name)) |
5652 | {} | |
5653 | ||
5654 | dw2_debug_names_iterator (const mapped_debug_names &map, | |
5655 | search_domain search, uint32_t namei) | |
5656 | : m_map (map), | |
5657 | m_search (search), | |
5658 | m_addr (find_vec_in_debug_names (map, namei)) | |
5659 | {} | |
5660 | ||
3b00ef10 TT |
5661 | dw2_debug_names_iterator (const mapped_debug_names &map, |
5662 | block_enum block_index, domain_enum domain, | |
5663 | uint32_t namei) | |
5664 | : m_map (map), m_block_index (block_index), m_domain (domain), | |
5665 | m_addr (find_vec_in_debug_names (map, namei)) | |
5666 | {} | |
5667 | ||
927aa2e7 JK |
5668 | /* Return the next matching CU or NULL if there are no more. */ |
5669 | dwarf2_per_cu_data *next (); | |
5670 | ||
5671 | private: | |
5672 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, | |
5673 | const char *name); | |
5674 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, | |
5675 | uint32_t namei); | |
5676 | ||
5677 | /* The internalized form of .debug_names. */ | |
5678 | const mapped_debug_names &m_map; | |
5679 | ||
2b79f376 SM |
5680 | /* If set, only look for symbols that match that block. Valid values are |
5681 | GLOBAL_BLOCK and STATIC_BLOCK. */ | |
5682 | const gdb::optional<block_enum> m_block_index; | |
927aa2e7 JK |
5683 | |
5684 | /* The kind of symbol we're looking for. */ | |
5685 | const domain_enum m_domain = UNDEF_DOMAIN; | |
5686 | const search_domain m_search = ALL_DOMAIN; | |
5687 | ||
5688 | /* The list of CUs from the index entry of the symbol, or NULL if | |
5689 | not found. */ | |
5690 | const gdb_byte *m_addr; | |
5691 | }; | |
5692 | ||
5693 | const char * | |
5694 | mapped_debug_names::namei_to_name (uint32_t namei) const | |
5695 | { | |
5696 | const ULONGEST namei_string_offs | |
5697 | = extract_unsigned_integer ((name_table_string_offs_reordered | |
5698 | + namei * offset_size), | |
5699 | offset_size, | |
5700 | dwarf5_byte_order); | |
5701 | return read_indirect_string_at_offset | |
ed2dc618 | 5702 | (dwarf2_per_objfile, dwarf2_per_objfile->objfile->obfd, namei_string_offs); |
927aa2e7 JK |
5703 | } |
5704 | ||
5705 | /* Find a slot in .debug_names for the object named NAME. If NAME is | |
5706 | found, return pointer to its pool data. If NAME cannot be found, | |
5707 | return NULL. */ | |
5708 | ||
5709 | const gdb_byte * | |
5710 | dw2_debug_names_iterator::find_vec_in_debug_names | |
5711 | (const mapped_debug_names &map, const char *name) | |
5712 | { | |
5713 | int (*cmp) (const char *, const char *); | |
5714 | ||
54ee4252 | 5715 | gdb::unique_xmalloc_ptr<char> without_params; |
927aa2e7 JK |
5716 | if (current_language->la_language == language_cplus |
5717 | || current_language->la_language == language_fortran | |
5718 | || current_language->la_language == language_d) | |
5719 | { | |
5720 | /* NAME is already canonical. Drop any qualifiers as | |
5721 | .debug_names does not contain any. */ | |
5722 | ||
5723 | if (strchr (name, '(') != NULL) | |
5724 | { | |
54ee4252 | 5725 | without_params = cp_remove_params (name); |
927aa2e7 | 5726 | if (without_params != NULL) |
54ee4252 | 5727 | name = without_params.get (); |
927aa2e7 JK |
5728 | } |
5729 | } | |
5730 | ||
5731 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); | |
5732 | ||
5733 | const uint32_t full_hash = dwarf5_djb_hash (name); | |
5734 | uint32_t namei | |
5735 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> | |
5736 | (map.bucket_table_reordered | |
5737 | + (full_hash % map.bucket_count)), 4, | |
5738 | map.dwarf5_byte_order); | |
5739 | if (namei == 0) | |
5740 | return NULL; | |
5741 | --namei; | |
5742 | if (namei >= map.name_count) | |
5743 | { | |
b98664d3 | 5744 | complaint (_("Wrong .debug_names with name index %u but name_count=%u " |
927aa2e7 JK |
5745 | "[in module %s]"), |
5746 | namei, map.name_count, | |
ed2dc618 | 5747 | objfile_name (map.dwarf2_per_objfile->objfile)); |
927aa2e7 JK |
5748 | return NULL; |
5749 | } | |
5750 | ||
5751 | for (;;) | |
5752 | { | |
5753 | const uint32_t namei_full_hash | |
5754 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> | |
5755 | (map.hash_table_reordered + namei), 4, | |
5756 | map.dwarf5_byte_order); | |
5757 | if (full_hash % map.bucket_count != namei_full_hash % map.bucket_count) | |
5758 | return NULL; | |
5759 | ||
5760 | if (full_hash == namei_full_hash) | |
5761 | { | |
5762 | const char *const namei_string = map.namei_to_name (namei); | |
5763 | ||
5764 | #if 0 /* An expensive sanity check. */ | |
5765 | if (namei_full_hash != dwarf5_djb_hash (namei_string)) | |
5766 | { | |
b98664d3 | 5767 | complaint (_("Wrong .debug_names hash for string at index %u " |
927aa2e7 JK |
5768 | "[in module %s]"), |
5769 | namei, objfile_name (dwarf2_per_objfile->objfile)); | |
5770 | return NULL; | |
5771 | } | |
5772 | #endif | |
5773 | ||
5774 | if (cmp (namei_string, name) == 0) | |
5775 | { | |
5776 | const ULONGEST namei_entry_offs | |
5777 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered | |
5778 | + namei * map.offset_size), | |
5779 | map.offset_size, map.dwarf5_byte_order); | |
5780 | return map.entry_pool + namei_entry_offs; | |
5781 | } | |
5782 | } | |
5783 | ||
5784 | ++namei; | |
5785 | if (namei >= map.name_count) | |
5786 | return NULL; | |
5787 | } | |
5788 | } | |
5789 | ||
5790 | const gdb_byte * | |
5791 | dw2_debug_names_iterator::find_vec_in_debug_names | |
5792 | (const mapped_debug_names &map, uint32_t namei) | |
5793 | { | |
5794 | if (namei >= map.name_count) | |
5795 | { | |
b98664d3 | 5796 | complaint (_("Wrong .debug_names with name index %u but name_count=%u " |
927aa2e7 JK |
5797 | "[in module %s]"), |
5798 | namei, map.name_count, | |
ed2dc618 | 5799 | objfile_name (map.dwarf2_per_objfile->objfile)); |
927aa2e7 JK |
5800 | return NULL; |
5801 | } | |
5802 | ||
5803 | const ULONGEST namei_entry_offs | |
5804 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered | |
5805 | + namei * map.offset_size), | |
5806 | map.offset_size, map.dwarf5_byte_order); | |
5807 | return map.entry_pool + namei_entry_offs; | |
5808 | } | |
5809 | ||
5810 | /* See dw2_debug_names_iterator. */ | |
5811 | ||
5812 | dwarf2_per_cu_data * | |
5813 | dw2_debug_names_iterator::next () | |
5814 | { | |
5815 | if (m_addr == NULL) | |
5816 | return NULL; | |
5817 | ||
ed2dc618 SM |
5818 | struct dwarf2_per_objfile *dwarf2_per_objfile = m_map.dwarf2_per_objfile; |
5819 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5820 | bfd *const abfd = objfile->obfd; | |
927aa2e7 JK |
5821 | |
5822 | again: | |
5823 | ||
5824 | unsigned int bytes_read; | |
5825 | const ULONGEST abbrev = read_unsigned_leb128 (abfd, m_addr, &bytes_read); | |
5826 | m_addr += bytes_read; | |
5827 | if (abbrev == 0) | |
5828 | return NULL; | |
5829 | ||
5830 | const auto indexval_it = m_map.abbrev_map.find (abbrev); | |
5831 | if (indexval_it == m_map.abbrev_map.cend ()) | |
5832 | { | |
b98664d3 | 5833 | complaint (_("Wrong .debug_names undefined abbrev code %s " |
927aa2e7 | 5834 | "[in module %s]"), |
ed2dc618 | 5835 | pulongest (abbrev), objfile_name (objfile)); |
927aa2e7 JK |
5836 | return NULL; |
5837 | } | |
5838 | const mapped_debug_names::index_val &indexval = indexval_it->second; | |
beadd3e8 SM |
5839 | enum class symbol_linkage { |
5840 | unknown, | |
5841 | static_, | |
5842 | extern_, | |
23c13d42 | 5843 | } symbol_linkage_ = symbol_linkage::unknown; |
927aa2e7 JK |
5844 | dwarf2_per_cu_data *per_cu = NULL; |
5845 | for (const mapped_debug_names::index_val::attr &attr : indexval.attr_vec) | |
5846 | { | |
5847 | ULONGEST ull; | |
5848 | switch (attr.form) | |
5849 | { | |
5850 | case DW_FORM_implicit_const: | |
5851 | ull = attr.implicit_const; | |
5852 | break; | |
5853 | case DW_FORM_flag_present: | |
5854 | ull = 1; | |
5855 | break; | |
5856 | case DW_FORM_udata: | |
5857 | ull = read_unsigned_leb128 (abfd, m_addr, &bytes_read); | |
5858 | m_addr += bytes_read; | |
5859 | break; | |
5860 | default: | |
b98664d3 | 5861 | complaint (_("Unsupported .debug_names form %s [in module %s]"), |
927aa2e7 | 5862 | dwarf_form_name (attr.form), |
ed2dc618 | 5863 | objfile_name (objfile)); |
927aa2e7 JK |
5864 | return NULL; |
5865 | } | |
5866 | switch (attr.dw_idx) | |
5867 | { | |
5868 | case DW_IDX_compile_unit: | |
5869 | /* Don't crash on bad data. */ | |
b76e467d | 5870 | if (ull >= dwarf2_per_objfile->all_comp_units.size ()) |
927aa2e7 | 5871 | { |
b98664d3 | 5872 | complaint (_(".debug_names entry has bad CU index %s" |
927aa2e7 JK |
5873 | " [in module %s]"), |
5874 | pulongest (ull), | |
5875 | objfile_name (dwarf2_per_objfile->objfile)); | |
5876 | continue; | |
5877 | } | |
ff4c9fec | 5878 | per_cu = dwarf2_per_objfile->get_cutu (ull); |
927aa2e7 | 5879 | break; |
8af5c486 JK |
5880 | case DW_IDX_type_unit: |
5881 | /* Don't crash on bad data. */ | |
b2bdb8cf | 5882 | if (ull >= dwarf2_per_objfile->all_type_units.size ()) |
8af5c486 | 5883 | { |
b98664d3 | 5884 | complaint (_(".debug_names entry has bad TU index %s" |
8af5c486 JK |
5885 | " [in module %s]"), |
5886 | pulongest (ull), | |
5887 | objfile_name (dwarf2_per_objfile->objfile)); | |
5888 | continue; | |
5889 | } | |
ff4c9fec | 5890 | per_cu = &dwarf2_per_objfile->get_tu (ull)->per_cu; |
8af5c486 | 5891 | break; |
927aa2e7 JK |
5892 | case DW_IDX_GNU_internal: |
5893 | if (!m_map.augmentation_is_gdb) | |
5894 | break; | |
23c13d42 | 5895 | symbol_linkage_ = symbol_linkage::static_; |
927aa2e7 JK |
5896 | break; |
5897 | case DW_IDX_GNU_external: | |
5898 | if (!m_map.augmentation_is_gdb) | |
5899 | break; | |
23c13d42 | 5900 | symbol_linkage_ = symbol_linkage::extern_; |
927aa2e7 JK |
5901 | break; |
5902 | } | |
5903 | } | |
5904 | ||
5905 | /* Skip if already read in. */ | |
5906 | if (per_cu->v.quick->compunit_symtab) | |
5907 | goto again; | |
5908 | ||
5909 | /* Check static vs global. */ | |
23c13d42 | 5910 | if (symbol_linkage_ != symbol_linkage::unknown && m_block_index.has_value ()) |
927aa2e7 | 5911 | { |
2b79f376 | 5912 | const bool want_static = *m_block_index == STATIC_BLOCK; |
23c13d42 SM |
5913 | const bool symbol_is_static = |
5914 | symbol_linkage_ == symbol_linkage::static_; | |
beadd3e8 | 5915 | if (want_static != symbol_is_static) |
2b79f376 | 5916 | goto again; |
927aa2e7 JK |
5917 | } |
5918 | ||
5919 | /* Match dw2_symtab_iter_next, symbol_kind | |
5920 | and debug_names::psymbol_tag. */ | |
5921 | switch (m_domain) | |
5922 | { | |
5923 | case VAR_DOMAIN: | |
5924 | switch (indexval.dwarf_tag) | |
5925 | { | |
5926 | case DW_TAG_variable: | |
5927 | case DW_TAG_subprogram: | |
5928 | /* Some types are also in VAR_DOMAIN. */ | |
5929 | case DW_TAG_typedef: | |
5930 | case DW_TAG_structure_type: | |
5931 | break; | |
5932 | default: | |
5933 | goto again; | |
5934 | } | |
5935 | break; | |
5936 | case STRUCT_DOMAIN: | |
5937 | switch (indexval.dwarf_tag) | |
5938 | { | |
5939 | case DW_TAG_typedef: | |
5940 | case DW_TAG_structure_type: | |
5941 | break; | |
5942 | default: | |
5943 | goto again; | |
5944 | } | |
5945 | break; | |
5946 | case LABEL_DOMAIN: | |
5947 | switch (indexval.dwarf_tag) | |
5948 | { | |
5949 | case 0: | |
5950 | case DW_TAG_variable: | |
5951 | break; | |
5952 | default: | |
5953 | goto again; | |
5954 | } | |
5955 | break; | |
5956 | default: | |
5957 | break; | |
5958 | } | |
5959 | ||
5960 | /* Match dw2_expand_symtabs_matching, symbol_kind and | |
5961 | debug_names::psymbol_tag. */ | |
5962 | switch (m_search) | |
4b514bc8 | 5963 | { |
927aa2e7 JK |
5964 | case VARIABLES_DOMAIN: |
5965 | switch (indexval.dwarf_tag) | |
4b514bc8 | 5966 | { |
927aa2e7 JK |
5967 | case DW_TAG_variable: |
5968 | break; | |
5969 | default: | |
5970 | goto again; | |
4b514bc8 | 5971 | } |
927aa2e7 JK |
5972 | break; |
5973 | case FUNCTIONS_DOMAIN: | |
5974 | switch (indexval.dwarf_tag) | |
4b514bc8 | 5975 | { |
927aa2e7 JK |
5976 | case DW_TAG_subprogram: |
5977 | break; | |
5978 | default: | |
5979 | goto again; | |
4b514bc8 | 5980 | } |
927aa2e7 JK |
5981 | break; |
5982 | case TYPES_DOMAIN: | |
5983 | switch (indexval.dwarf_tag) | |
5984 | { | |
5985 | case DW_TAG_typedef: | |
5986 | case DW_TAG_structure_type: | |
5987 | break; | |
5988 | default: | |
5989 | goto again; | |
5990 | } | |
5991 | break; | |
5992 | default: | |
5993 | break; | |
4b514bc8 | 5994 | } |
927aa2e7 JK |
5995 | |
5996 | return per_cu; | |
4b514bc8 | 5997 | } |
61920122 | 5998 | |
927aa2e7 | 5999 | static struct compunit_symtab * |
c7f839cb | 6000 | dw2_debug_names_lookup_symbol (struct objfile *objfile, block_enum block_index, |
927aa2e7 | 6001 | const char *name, domain_enum domain) |
4b514bc8 | 6002 | { |
ed2dc618 SM |
6003 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6004 | = get_dwarf2_per_objfile (objfile); | |
61920122 | 6005 | |
927aa2e7 JK |
6006 | const auto &mapp = dwarf2_per_objfile->debug_names_table; |
6007 | if (!mapp) | |
61920122 | 6008 | { |
927aa2e7 JK |
6009 | /* index is NULL if OBJF_READNOW. */ |
6010 | return NULL; | |
6011 | } | |
6012 | const auto &map = *mapp; | |
9291a0cd | 6013 | |
2b79f376 | 6014 | dw2_debug_names_iterator iter (map, block_index, domain, name); |
9703b513 | 6015 | |
927aa2e7 JK |
6016 | struct compunit_symtab *stab_best = NULL; |
6017 | struct dwarf2_per_cu_data *per_cu; | |
6018 | while ((per_cu = iter.next ()) != NULL) | |
6019 | { | |
6020 | struct symbol *sym, *with_opaque = NULL; | |
58f0c718 | 6021 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu, false); |
927aa2e7 | 6022 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); |
582942f4 | 6023 | const struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
9703b513 | 6024 | |
927aa2e7 JK |
6025 | sym = block_find_symbol (block, name, domain, |
6026 | block_find_non_opaque_type_preferred, | |
6027 | &with_opaque); | |
9703b513 | 6028 | |
927aa2e7 JK |
6029 | /* Some caution must be observed with overloaded functions and |
6030 | methods, since the index will not contain any overload | |
6031 | information (but NAME might contain it). */ | |
a3ec0bb1 | 6032 | |
927aa2e7 JK |
6033 | if (sym != NULL |
6034 | && strcmp_iw (SYMBOL_SEARCH_NAME (sym), name) == 0) | |
6035 | return stab; | |
6036 | if (with_opaque != NULL | |
6037 | && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque), name) == 0) | |
6038 | stab_best = stab; | |
9703b513 | 6039 | |
927aa2e7 | 6040 | /* Keep looking through other CUs. */ |
9703b513 TT |
6041 | } |
6042 | ||
927aa2e7 | 6043 | return stab_best; |
9703b513 TT |
6044 | } |
6045 | ||
927aa2e7 JK |
6046 | /* This dumps minimal information about .debug_names. It is called |
6047 | via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase | |
6048 | uses this to verify that .debug_names has been loaded. */ | |
9291a0cd | 6049 | |
927aa2e7 JK |
6050 | static void |
6051 | dw2_debug_names_dump (struct objfile *objfile) | |
6052 | { | |
ed2dc618 SM |
6053 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6054 | = get_dwarf2_per_objfile (objfile); | |
6055 | ||
927aa2e7 JK |
6056 | gdb_assert (dwarf2_per_objfile->using_index); |
6057 | printf_filtered (".debug_names:"); | |
6058 | if (dwarf2_per_objfile->debug_names_table) | |
6059 | printf_filtered (" exists\n"); | |
6060 | else | |
6061 | printf_filtered (" faked for \"readnow\"\n"); | |
6062 | printf_filtered ("\n"); | |
9291a0cd TT |
6063 | } |
6064 | ||
9291a0cd | 6065 | static void |
927aa2e7 JK |
6066 | dw2_debug_names_expand_symtabs_for_function (struct objfile *objfile, |
6067 | const char *func_name) | |
9291a0cd | 6068 | { |
ed2dc618 SM |
6069 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6070 | = get_dwarf2_per_objfile (objfile); | |
ae2de4f8 | 6071 | |
927aa2e7 JK |
6072 | /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */ |
6073 | if (dwarf2_per_objfile->debug_names_table) | |
24c79950 | 6074 | { |
927aa2e7 | 6075 | const mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; |
24c79950 | 6076 | |
2b79f376 | 6077 | dw2_debug_names_iterator iter (map, {}, VAR_DOMAIN, func_name); |
24c79950 | 6078 | |
927aa2e7 JK |
6079 | struct dwarf2_per_cu_data *per_cu; |
6080 | while ((per_cu = iter.next ()) != NULL) | |
58f0c718 | 6081 | dw2_instantiate_symtab (per_cu, false); |
927aa2e7 JK |
6082 | } |
6083 | } | |
24c79950 | 6084 | |
3b00ef10 TT |
6085 | static void |
6086 | dw2_debug_names_map_matching_symbols | |
6087 | (struct objfile *objfile, | |
6088 | const lookup_name_info &name, domain_enum domain, | |
6089 | int global, | |
6090 | gdb::function_view<symbol_found_callback_ftype> callback, | |
6091 | symbol_compare_ftype *ordered_compare) | |
6092 | { | |
6093 | struct dwarf2_per_objfile *dwarf2_per_objfile | |
6094 | = get_dwarf2_per_objfile (objfile); | |
6095 | ||
6096 | /* debug_names_table is NULL if OBJF_READNOW. */ | |
6097 | if (!dwarf2_per_objfile->debug_names_table) | |
6098 | return; | |
6099 | ||
6100 | mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; | |
6101 | const block_enum block_kind = global ? GLOBAL_BLOCK : STATIC_BLOCK; | |
6102 | ||
6103 | const char *match_name = name.ada ().lookup_name ().c_str (); | |
6104 | auto matcher = [&] (const char *symname) | |
6105 | { | |
6106 | if (ordered_compare == nullptr) | |
6107 | return true; | |
6108 | return ordered_compare (symname, match_name) == 0; | |
6109 | }; | |
6110 | ||
6111 | dw2_expand_symtabs_matching_symbol (map, name, matcher, ALL_DOMAIN, | |
6112 | [&] (offset_type namei) | |
6113 | { | |
6114 | /* The name was matched, now expand corresponding CUs that were | |
6115 | marked. */ | |
6116 | dw2_debug_names_iterator iter (map, block_kind, domain, namei); | |
6117 | ||
6118 | struct dwarf2_per_cu_data *per_cu; | |
6119 | while ((per_cu = iter.next ()) != NULL) | |
6120 | dw2_expand_symtabs_matching_one (per_cu, nullptr, nullptr); | |
6121 | return true; | |
6122 | }); | |
6123 | ||
6124 | /* It's a shame we couldn't do this inside the | |
6125 | dw2_expand_symtabs_matching_symbol callback, but that skips CUs | |
6126 | that have already been expanded. Instead, this loop matches what | |
6127 | the psymtab code does. */ | |
6128 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) | |
6129 | { | |
6130 | struct compunit_symtab *cust = per_cu->v.quick->compunit_symtab; | |
6131 | if (cust != nullptr) | |
6132 | { | |
6133 | const struct block *block | |
6134 | = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust), block_kind); | |
6135 | if (!iterate_over_symbols_terminated (block, name, | |
6136 | domain, callback)) | |
6137 | break; | |
6138 | } | |
6139 | } | |
6140 | } | |
6141 | ||
927aa2e7 JK |
6142 | static void |
6143 | dw2_debug_names_expand_symtabs_matching | |
6144 | (struct objfile *objfile, | |
6145 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
6146 | const lookup_name_info &lookup_name, | |
6147 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
6148 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
6149 | enum search_domain kind) | |
6150 | { | |
ed2dc618 SM |
6151 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6152 | = get_dwarf2_per_objfile (objfile); | |
9291a0cd | 6153 | |
927aa2e7 JK |
6154 | /* debug_names_table is NULL if OBJF_READNOW. */ |
6155 | if (!dwarf2_per_objfile->debug_names_table) | |
6156 | return; | |
9291a0cd | 6157 | |
ed2dc618 | 6158 | dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile, file_matcher); |
24c79950 | 6159 | |
44ed8f3e | 6160 | mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; |
bbf2f4df | 6161 | |
44ed8f3e PA |
6162 | dw2_expand_symtabs_matching_symbol (map, lookup_name, |
6163 | symbol_matcher, | |
6164 | kind, [&] (offset_type namei) | |
927aa2e7 | 6165 | { |
927aa2e7 JK |
6166 | /* The name was matched, now expand corresponding CUs that were |
6167 | marked. */ | |
6168 | dw2_debug_names_iterator iter (map, kind, namei); | |
bbf2f4df | 6169 | |
927aa2e7 JK |
6170 | struct dwarf2_per_cu_data *per_cu; |
6171 | while ((per_cu = iter.next ()) != NULL) | |
6172 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, | |
6173 | expansion_notify); | |
3b00ef10 | 6174 | return true; |
44ed8f3e | 6175 | }); |
9291a0cd TT |
6176 | } |
6177 | ||
927aa2e7 | 6178 | const struct quick_symbol_functions dwarf2_debug_names_functions = |
9291a0cd TT |
6179 | { |
6180 | dw2_has_symbols, | |
6181 | dw2_find_last_source_symtab, | |
6182 | dw2_forget_cached_source_info, | |
f8eba3c6 | 6183 | dw2_map_symtabs_matching_filename, |
927aa2e7 | 6184 | dw2_debug_names_lookup_symbol, |
9291a0cd | 6185 | dw2_print_stats, |
927aa2e7 | 6186 | dw2_debug_names_dump, |
927aa2e7 | 6187 | dw2_debug_names_expand_symtabs_for_function, |
9291a0cd | 6188 | dw2_expand_all_symtabs, |
652a8996 | 6189 | dw2_expand_symtabs_with_fullname, |
3b00ef10 | 6190 | dw2_debug_names_map_matching_symbols, |
927aa2e7 | 6191 | dw2_debug_names_expand_symtabs_matching, |
43f3e411 | 6192 | dw2_find_pc_sect_compunit_symtab, |
71a3c369 | 6193 | NULL, |
9291a0cd TT |
6194 | dw2_map_symbol_filenames |
6195 | }; | |
6196 | ||
4485a1c1 SM |
6197 | /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point |
6198 | to either a dwarf2_per_objfile or dwz_file object. */ | |
6199 | ||
6200 | template <typename T> | |
6201 | static gdb::array_view<const gdb_byte> | |
6202 | get_gdb_index_contents_from_section (objfile *obj, T *section_owner) | |
6203 | { | |
6204 | dwarf2_section_info *section = §ion_owner->gdb_index; | |
6205 | ||
6206 | if (dwarf2_section_empty_p (section)) | |
6207 | return {}; | |
6208 | ||
6209 | /* Older elfutils strip versions could keep the section in the main | |
6210 | executable while splitting it for the separate debug info file. */ | |
6211 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) | |
6212 | return {}; | |
6213 | ||
6214 | dwarf2_read_section (obj, section); | |
6215 | ||
8bebfcda PA |
6216 | /* dwarf2_section_info::size is a bfd_size_type, while |
6217 | gdb::array_view works with size_t. On 32-bit hosts, with | |
6218 | --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t | |
6219 | is 32-bit. So we need an explicit narrowing conversion here. | |
6220 | This is fine, because it's impossible to allocate or mmap an | |
6221 | array/buffer larger than what size_t can represent. */ | |
6222 | return gdb::make_array_view (section->buffer, section->size); | |
4485a1c1 SM |
6223 | } |
6224 | ||
87d6a7aa SM |
6225 | /* Lookup the index cache for the contents of the index associated to |
6226 | DWARF2_OBJ. */ | |
6227 | ||
6228 | static gdb::array_view<const gdb_byte> | |
6229 | get_gdb_index_contents_from_cache (objfile *obj, dwarf2_per_objfile *dwarf2_obj) | |
6230 | { | |
6231 | const bfd_build_id *build_id = build_id_bfd_get (obj->obfd); | |
6232 | if (build_id == nullptr) | |
6233 | return {}; | |
6234 | ||
6235 | return global_index_cache.lookup_gdb_index (build_id, | |
6236 | &dwarf2_obj->index_cache_res); | |
6237 | } | |
6238 | ||
6239 | /* Same as the above, but for DWZ. */ | |
6240 | ||
6241 | static gdb::array_view<const gdb_byte> | |
6242 | get_gdb_index_contents_from_cache_dwz (objfile *obj, dwz_file *dwz) | |
6243 | { | |
6244 | const bfd_build_id *build_id = build_id_bfd_get (dwz->dwz_bfd.get ()); | |
6245 | if (build_id == nullptr) | |
6246 | return {}; | |
6247 | ||
6248 | return global_index_cache.lookup_gdb_index (build_id, &dwz->index_cache_res); | |
6249 | } | |
6250 | ||
3c0aa29a | 6251 | /* See symfile.h. */ |
9291a0cd | 6252 | |
3c0aa29a PA |
6253 | bool |
6254 | dwarf2_initialize_objfile (struct objfile *objfile, dw_index_kind *index_kind) | |
9291a0cd | 6255 | { |
ed2dc618 SM |
6256 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6257 | = get_dwarf2_per_objfile (objfile); | |
6258 | ||
9291a0cd TT |
6259 | /* If we're about to read full symbols, don't bother with the |
6260 | indices. In this case we also don't care if some other debug | |
6261 | format is making psymtabs, because they are all about to be | |
6262 | expanded anyway. */ | |
6263 | if ((objfile->flags & OBJF_READNOW)) | |
6264 | { | |
9291a0cd | 6265 | dwarf2_per_objfile->using_index = 1; |
ed2dc618 SM |
6266 | create_all_comp_units (dwarf2_per_objfile); |
6267 | create_all_type_units (dwarf2_per_objfile); | |
b76e467d SM |
6268 | dwarf2_per_objfile->quick_file_names_table |
6269 | = create_quick_file_names_table | |
6270 | (dwarf2_per_objfile->all_comp_units.size ()); | |
9291a0cd | 6271 | |
b76e467d | 6272 | for (int i = 0; i < (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 6273 | + dwarf2_per_objfile->all_type_units.size ()); ++i) |
9291a0cd | 6274 | { |
ff4c9fec | 6275 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 6276 | |
e254ef6a DE |
6277 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
6278 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
6279 | } |
6280 | ||
6281 | /* Return 1 so that gdb sees the "quick" functions. However, | |
6282 | these functions will be no-ops because we will have expanded | |
6283 | all symtabs. */ | |
3c0aa29a PA |
6284 | *index_kind = dw_index_kind::GDB_INDEX; |
6285 | return true; | |
9291a0cd TT |
6286 | } |
6287 | ||
ed2dc618 | 6288 | if (dwarf2_read_debug_names (dwarf2_per_objfile)) |
3c0aa29a PA |
6289 | { |
6290 | *index_kind = dw_index_kind::DEBUG_NAMES; | |
6291 | return true; | |
6292 | } | |
927aa2e7 | 6293 | |
4485a1c1 SM |
6294 | if (dwarf2_read_gdb_index (dwarf2_per_objfile, |
6295 | get_gdb_index_contents_from_section<struct dwarf2_per_objfile>, | |
6296 | get_gdb_index_contents_from_section<dwz_file>)) | |
3c0aa29a PA |
6297 | { |
6298 | *index_kind = dw_index_kind::GDB_INDEX; | |
6299 | return true; | |
6300 | } | |
9291a0cd | 6301 | |
87d6a7aa SM |
6302 | /* ... otherwise, try to find the index in the index cache. */ |
6303 | if (dwarf2_read_gdb_index (dwarf2_per_objfile, | |
6304 | get_gdb_index_contents_from_cache, | |
6305 | get_gdb_index_contents_from_cache_dwz)) | |
6306 | { | |
6307 | global_index_cache.hit (); | |
6308 | *index_kind = dw_index_kind::GDB_INDEX; | |
6309 | return true; | |
6310 | } | |
6311 | ||
6312 | global_index_cache.miss (); | |
3c0aa29a | 6313 | return false; |
9291a0cd TT |
6314 | } |
6315 | ||
6316 | \f | |
6317 | ||
dce234bc PP |
6318 | /* Build a partial symbol table. */ |
6319 | ||
6320 | void | |
f29dff0a | 6321 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 6322 | { |
ed2dc618 SM |
6323 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6324 | = get_dwarf2_per_objfile (objfile); | |
c9bf0622 | 6325 | |
6eee24ce | 6326 | init_psymbol_list (objfile, 1024); |
c906108c | 6327 | |
a70b8144 | 6328 | try |
c9bf0622 TT |
6329 | { |
6330 | /* This isn't really ideal: all the data we allocate on the | |
6331 | objfile's obstack is still uselessly kept around. However, | |
6332 | freeing it seems unsafe. */ | |
906768f9 | 6333 | psymtab_discarder psymtabs (objfile); |
ed2dc618 | 6334 | dwarf2_build_psymtabs_hard (dwarf2_per_objfile); |
906768f9 | 6335 | psymtabs.keep (); |
87d6a7aa SM |
6336 | |
6337 | /* (maybe) store an index in the cache. */ | |
6338 | global_index_cache.store (dwarf2_per_objfile); | |
c9bf0622 | 6339 | } |
230d2906 | 6340 | catch (const gdb_exception_error &except) |
492d29ea PA |
6341 | { |
6342 | exception_print (gdb_stderr, except); | |
6343 | } | |
c906108c | 6344 | } |
c906108c | 6345 | |
1ce1cefd DE |
6346 | /* Return the total length of the CU described by HEADER. */ |
6347 | ||
6348 | static unsigned int | |
6349 | get_cu_length (const struct comp_unit_head *header) | |
6350 | { | |
6351 | return header->initial_length_size + header->length; | |
6352 | } | |
6353 | ||
9c541725 | 6354 | /* Return TRUE if SECT_OFF is within CU_HEADER. */ |
45452591 | 6355 | |
9c541725 PA |
6356 | static inline bool |
6357 | offset_in_cu_p (const comp_unit_head *cu_header, sect_offset sect_off) | |
45452591 | 6358 | { |
9c541725 PA |
6359 | sect_offset bottom = cu_header->sect_off; |
6360 | sect_offset top = cu_header->sect_off + get_cu_length (cu_header); | |
9a619af0 | 6361 | |
9c541725 | 6362 | return sect_off >= bottom && sect_off < top; |
45452591 DE |
6363 | } |
6364 | ||
3b80fe9b DE |
6365 | /* Find the base address of the compilation unit for range lists and |
6366 | location lists. It will normally be specified by DW_AT_low_pc. | |
6367 | In DWARF-3 draft 4, the base address could be overridden by | |
6368 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
6369 | compilation units with discontinuous ranges. */ | |
6370 | ||
6371 | static void | |
6372 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
6373 | { | |
6374 | struct attribute *attr; | |
6375 | ||
6376 | cu->base_known = 0; | |
6377 | cu->base_address = 0; | |
6378 | ||
6379 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
6380 | if (attr) | |
6381 | { | |
31aa7e4e | 6382 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
6383 | cu->base_known = 1; |
6384 | } | |
6385 | else | |
6386 | { | |
6387 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
6388 | if (attr) | |
6389 | { | |
31aa7e4e | 6390 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
6391 | cu->base_known = 1; |
6392 | } | |
6393 | } | |
6394 | } | |
6395 | ||
93311388 | 6396 | /* Read in the comp unit header information from the debug_info at info_ptr. |
43988095 | 6397 | Use rcuh_kind::COMPILE as the default type if not known by the caller. |
93311388 DE |
6398 | NOTE: This leaves members offset, first_die_offset to be filled in |
6399 | by the caller. */ | |
107d2387 | 6400 | |
d521ce57 | 6401 | static const gdb_byte * |
107d2387 | 6402 | read_comp_unit_head (struct comp_unit_head *cu_header, |
43988095 JK |
6403 | const gdb_byte *info_ptr, |
6404 | struct dwarf2_section_info *section, | |
6405 | rcuh_kind section_kind) | |
107d2387 AC |
6406 | { |
6407 | int signed_addr; | |
891d2f0b | 6408 | unsigned int bytes_read; |
43988095 JK |
6409 | const char *filename = get_section_file_name (section); |
6410 | bfd *abfd = get_section_bfd_owner (section); | |
c764a876 DE |
6411 | |
6412 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
6413 | cu_header->initial_length_size = bytes_read; | |
6414 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 6415 | info_ptr += bytes_read; |
107d2387 | 6416 | cu_header->version = read_2_bytes (abfd, info_ptr); |
1ea5da02 TV |
6417 | if (cu_header->version < 2 || cu_header->version > 5) |
6418 | error (_("Dwarf Error: wrong version in compilation unit header " | |
6419 | "(is %d, should be 2, 3, 4 or 5) [in module %s]"), | |
6420 | cu_header->version, filename); | |
107d2387 | 6421 | info_ptr += 2; |
43988095 JK |
6422 | if (cu_header->version < 5) |
6423 | switch (section_kind) | |
6424 | { | |
6425 | case rcuh_kind::COMPILE: | |
6426 | cu_header->unit_type = DW_UT_compile; | |
6427 | break; | |
6428 | case rcuh_kind::TYPE: | |
6429 | cu_header->unit_type = DW_UT_type; | |
6430 | break; | |
6431 | default: | |
6432 | internal_error (__FILE__, __LINE__, | |
6433 | _("read_comp_unit_head: invalid section_kind")); | |
6434 | } | |
6435 | else | |
6436 | { | |
6437 | cu_header->unit_type = static_cast<enum dwarf_unit_type> | |
6438 | (read_1_byte (abfd, info_ptr)); | |
6439 | info_ptr += 1; | |
6440 | switch (cu_header->unit_type) | |
6441 | { | |
6442 | case DW_UT_compile: | |
a084a2a6 AT |
6443 | case DW_UT_partial: |
6444 | case DW_UT_skeleton: | |
6445 | case DW_UT_split_compile: | |
43988095 JK |
6446 | if (section_kind != rcuh_kind::COMPILE) |
6447 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
a084a2a6 AT |
6448 | "(is %s, should be %s) [in module %s]"), |
6449 | dwarf_unit_type_name (cu_header->unit_type), | |
6450 | dwarf_unit_type_name (DW_UT_type), filename); | |
43988095 JK |
6451 | break; |
6452 | case DW_UT_type: | |
a084a2a6 | 6453 | case DW_UT_split_type: |
43988095 JK |
6454 | section_kind = rcuh_kind::TYPE; |
6455 | break; | |
6456 | default: | |
6457 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
a084a2a6 AT |
6458 | "(is %#04x, should be one of: %s, %s, %s, %s or %s) " |
6459 | "[in module %s]"), cu_header->unit_type, | |
6460 | dwarf_unit_type_name (DW_UT_compile), | |
6461 | dwarf_unit_type_name (DW_UT_skeleton), | |
6462 | dwarf_unit_type_name (DW_UT_split_compile), | |
6463 | dwarf_unit_type_name (DW_UT_type), | |
6464 | dwarf_unit_type_name (DW_UT_split_type), filename); | |
43988095 JK |
6465 | } |
6466 | ||
6467 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
6468 | info_ptr += 1; | |
6469 | } | |
9c541725 PA |
6470 | cu_header->abbrev_sect_off = (sect_offset) read_offset (abfd, info_ptr, |
6471 | cu_header, | |
6472 | &bytes_read); | |
613e1657 | 6473 | info_ptr += bytes_read; |
43988095 JK |
6474 | if (cu_header->version < 5) |
6475 | { | |
6476 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
6477 | info_ptr += 1; | |
6478 | } | |
107d2387 AC |
6479 | signed_addr = bfd_get_sign_extend_vma (abfd); |
6480 | if (signed_addr < 0) | |
8e65ff28 | 6481 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 6482 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 6483 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 6484 | |
a084a2a6 AT |
6485 | bool header_has_signature = section_kind == rcuh_kind::TYPE |
6486 | || cu_header->unit_type == DW_UT_skeleton | |
6487 | || cu_header->unit_type == DW_UT_split_compile; | |
43988095 | 6488 | |
a084a2a6 AT |
6489 | if (header_has_signature) |
6490 | { | |
43988095 JK |
6491 | cu_header->signature = read_8_bytes (abfd, info_ptr); |
6492 | info_ptr += 8; | |
a084a2a6 | 6493 | } |
43988095 | 6494 | |
a084a2a6 AT |
6495 | if (section_kind == rcuh_kind::TYPE) |
6496 | { | |
6497 | LONGEST type_offset; | |
43988095 JK |
6498 | type_offset = read_offset (abfd, info_ptr, cu_header, &bytes_read); |
6499 | info_ptr += bytes_read; | |
9c541725 PA |
6500 | cu_header->type_cu_offset_in_tu = (cu_offset) type_offset; |
6501 | if (to_underlying (cu_header->type_cu_offset_in_tu) != type_offset) | |
43988095 JK |
6502 | error (_("Dwarf Error: Too big type_offset in compilation unit " |
6503 | "header (is %s) [in module %s]"), plongest (type_offset), | |
6504 | filename); | |
6505 | } | |
6506 | ||
107d2387 AC |
6507 | return info_ptr; |
6508 | } | |
6509 | ||
36586728 TT |
6510 | /* Helper function that returns the proper abbrev section for |
6511 | THIS_CU. */ | |
6512 | ||
6513 | static struct dwarf2_section_info * | |
6514 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
6515 | { | |
6516 | struct dwarf2_section_info *abbrev; | |
ed2dc618 | 6517 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
36586728 TT |
6518 | |
6519 | if (this_cu->is_dwz) | |
ed2dc618 | 6520 | abbrev = &dwarf2_get_dwz_file (dwarf2_per_objfile)->abbrev; |
36586728 TT |
6521 | else |
6522 | abbrev = &dwarf2_per_objfile->abbrev; | |
6523 | ||
6524 | return abbrev; | |
6525 | } | |
6526 | ||
9ff913ba DE |
6527 | /* Subroutine of read_and_check_comp_unit_head and |
6528 | read_and_check_type_unit_head to simplify them. | |
6529 | Perform various error checking on the header. */ | |
6530 | ||
6531 | static void | |
ed2dc618 SM |
6532 | error_check_comp_unit_head (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6533 | struct comp_unit_head *header, | |
4bdcc0c1 DE |
6534 | struct dwarf2_section_info *section, |
6535 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba | 6536 | { |
a32a8923 | 6537 | const char *filename = get_section_file_name (section); |
9ff913ba | 6538 | |
9c541725 | 6539 | if (to_underlying (header->abbrev_sect_off) |
36586728 | 6540 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9d8780f0 SM |
6541 | error (_("Dwarf Error: bad offset (%s) in compilation unit header " |
6542 | "(offset %s + 6) [in module %s]"), | |
6543 | sect_offset_str (header->abbrev_sect_off), | |
6544 | sect_offset_str (header->sect_off), | |
9ff913ba DE |
6545 | filename); |
6546 | ||
9c541725 | 6547 | /* Cast to ULONGEST to use 64-bit arithmetic when possible to |
9ff913ba | 6548 | avoid potential 32-bit overflow. */ |
9c541725 | 6549 | if (((ULONGEST) header->sect_off + get_cu_length (header)) |
9ff913ba | 6550 | > section->size) |
9c541725 | 6551 | error (_("Dwarf Error: bad length (0x%x) in compilation unit header " |
9d8780f0 SM |
6552 | "(offset %s + 0) [in module %s]"), |
6553 | header->length, sect_offset_str (header->sect_off), | |
9ff913ba DE |
6554 | filename); |
6555 | } | |
6556 | ||
6557 | /* Read in a CU/TU header and perform some basic error checking. | |
6558 | The contents of the header are stored in HEADER. | |
6559 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 6560 | |
d521ce57 | 6561 | static const gdb_byte * |
ed2dc618 SM |
6562 | read_and_check_comp_unit_head (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6563 | struct comp_unit_head *header, | |
9ff913ba | 6564 | struct dwarf2_section_info *section, |
4bdcc0c1 | 6565 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 6566 | const gdb_byte *info_ptr, |
43988095 | 6567 | rcuh_kind section_kind) |
72bf9492 | 6568 | { |
d521ce57 | 6569 | const gdb_byte *beg_of_comp_unit = info_ptr; |
72bf9492 | 6570 | |
9c541725 | 6571 | header->sect_off = (sect_offset) (beg_of_comp_unit - section->buffer); |
adabb602 | 6572 | |
43988095 | 6573 | info_ptr = read_comp_unit_head (header, info_ptr, section, section_kind); |
9ff913ba | 6574 | |
9c541725 | 6575 | header->first_die_cu_offset = (cu_offset) (info_ptr - beg_of_comp_unit); |
348e048f | 6576 | |
ed2dc618 SM |
6577 | error_check_comp_unit_head (dwarf2_per_objfile, header, section, |
6578 | abbrev_section); | |
9ff913ba DE |
6579 | |
6580 | return info_ptr; | |
348e048f DE |
6581 | } |
6582 | ||
f4dc4d17 DE |
6583 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
6584 | ||
6585 | static sect_offset | |
ed2dc618 SM |
6586 | read_abbrev_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6587 | struct dwarf2_section_info *section, | |
9c541725 | 6588 | sect_offset sect_off) |
f4dc4d17 | 6589 | { |
a32a8923 | 6590 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 6591 | const gdb_byte *info_ptr; |
ac298888 | 6592 | unsigned int initial_length_size, offset_size; |
43988095 | 6593 | uint16_t version; |
f4dc4d17 DE |
6594 | |
6595 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
9c541725 | 6596 | info_ptr = section->buffer + to_underlying (sect_off); |
ac298888 | 6597 | read_initial_length (abfd, info_ptr, &initial_length_size); |
f4dc4d17 | 6598 | offset_size = initial_length_size == 4 ? 4 : 8; |
43988095 JK |
6599 | info_ptr += initial_length_size; |
6600 | ||
6601 | version = read_2_bytes (abfd, info_ptr); | |
6602 | info_ptr += 2; | |
6603 | if (version >= 5) | |
6604 | { | |
6605 | /* Skip unit type and address size. */ | |
6606 | info_ptr += 2; | |
6607 | } | |
6608 | ||
9c541725 | 6609 | return (sect_offset) read_offset_1 (abfd, info_ptr, offset_size); |
f4dc4d17 DE |
6610 | } |
6611 | ||
aaa75496 JB |
6612 | /* Allocate a new partial symtab for file named NAME and mark this new |
6613 | partial symtab as being an include of PST. */ | |
6614 | ||
6615 | static void | |
d521ce57 | 6616 | dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst, |
aaa75496 JB |
6617 | struct objfile *objfile) |
6618 | { | |
6619 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
6620 | ||
fbd9ab74 JK |
6621 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
6622 | { | |
6623 | /* It shares objfile->objfile_obstack. */ | |
6624 | subpst->dirname = pst->dirname; | |
6625 | } | |
6626 | ||
a9342b62 | 6627 | subpst->dependencies = objfile->partial_symtabs->allocate_dependencies (1); |
aaa75496 JB |
6628 | subpst->dependencies[0] = pst; |
6629 | subpst->number_of_dependencies = 1; | |
6630 | ||
aaa75496 | 6631 | subpst->read_symtab = pst->read_symtab; |
aaa75496 JB |
6632 | |
6633 | /* No private part is necessary for include psymtabs. This property | |
6634 | can be used to differentiate between such include psymtabs and | |
10b3939b | 6635 | the regular ones. */ |
58a9656e | 6636 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
6637 | } |
6638 | ||
6639 | /* Read the Line Number Program data and extract the list of files | |
6640 | included by the source file represented by PST. Build an include | |
d85a05f0 | 6641 | partial symtab for each of these included files. */ |
aaa75496 JB |
6642 | |
6643 | static void | |
6644 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
6645 | struct die_info *die, |
6646 | struct partial_symtab *pst) | |
aaa75496 | 6647 | { |
fff8551c | 6648 | line_header_up lh; |
d85a05f0 | 6649 | struct attribute *attr; |
aaa75496 | 6650 | |
d85a05f0 DJ |
6651 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
6652 | if (attr) | |
9c541725 | 6653 | lh = dwarf_decode_line_header ((sect_offset) DW_UNSND (attr), cu); |
aaa75496 JB |
6654 | if (lh == NULL) |
6655 | return; /* No linetable, so no includes. */ | |
6656 | ||
79748972 TT |
6657 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note |
6658 | that we pass in the raw text_low here; that is ok because we're | |
6659 | only decoding the line table to make include partial symtabs, and | |
6660 | so the addresses aren't really used. */ | |
4ae976d1 | 6661 | dwarf_decode_lines (lh.get (), pst->dirname, cu, pst, |
79748972 | 6662 | pst->raw_text_low (), 1); |
aaa75496 JB |
6663 | } |
6664 | ||
348e048f | 6665 | static hashval_t |
52dc124a | 6666 | hash_signatured_type (const void *item) |
348e048f | 6667 | { |
9a3c8263 SM |
6668 | const struct signatured_type *sig_type |
6669 | = (const struct signatured_type *) item; | |
9a619af0 | 6670 | |
348e048f | 6671 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 6672 | return sig_type->signature; |
348e048f DE |
6673 | } |
6674 | ||
6675 | static int | |
52dc124a | 6676 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f | 6677 | { |
9a3c8263 SM |
6678 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
6679 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; | |
9a619af0 | 6680 | |
348e048f DE |
6681 | return lhs->signature == rhs->signature; |
6682 | } | |
6683 | ||
1fd400ff TT |
6684 | /* Allocate a hash table for signatured types. */ |
6685 | ||
6686 | static htab_t | |
673bfd45 | 6687 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
6688 | { |
6689 | return htab_create_alloc_ex (41, | |
52dc124a DE |
6690 | hash_signatured_type, |
6691 | eq_signatured_type, | |
1fd400ff TT |
6692 | NULL, |
6693 | &objfile->objfile_obstack, | |
6694 | hashtab_obstack_allocate, | |
6695 | dummy_obstack_deallocate); | |
6696 | } | |
6697 | ||
d467dd73 | 6698 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
6699 | |
6700 | static int | |
d467dd73 | 6701 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff | 6702 | { |
9a3c8263 | 6703 | struct signatured_type *sigt = (struct signatured_type *) *slot; |
b2bdb8cf SM |
6704 | std::vector<signatured_type *> *all_type_units |
6705 | = (std::vector<signatured_type *> *) datum; | |
1fd400ff | 6706 | |
b2bdb8cf | 6707 | all_type_units->push_back (sigt); |
1fd400ff TT |
6708 | |
6709 | return 1; | |
6710 | } | |
6711 | ||
78d4d2c5 | 6712 | /* A helper for create_debug_types_hash_table. Read types from SECTION |
43988095 JK |
6713 | and fill them into TYPES_HTAB. It will process only type units, |
6714 | therefore DW_UT_type. */ | |
c88ee1f0 | 6715 | |
78d4d2c5 | 6716 | static void |
ed2dc618 SM |
6717 | create_debug_type_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6718 | struct dwo_file *dwo_file, | |
43988095 JK |
6719 | dwarf2_section_info *section, htab_t &types_htab, |
6720 | rcuh_kind section_kind) | |
348e048f | 6721 | { |
3019eac3 | 6722 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4bdcc0c1 | 6723 | struct dwarf2_section_info *abbrev_section; |
78d4d2c5 JK |
6724 | bfd *abfd; |
6725 | const gdb_byte *info_ptr, *end_ptr; | |
348e048f | 6726 | |
4bdcc0c1 DE |
6727 | abbrev_section = (dwo_file != NULL |
6728 | ? &dwo_file->sections.abbrev | |
6729 | : &dwarf2_per_objfile->abbrev); | |
6730 | ||
b4f54984 | 6731 | if (dwarf_read_debug) |
43988095 JK |
6732 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", |
6733 | get_section_name (section), | |
a32a8923 | 6734 | get_section_file_name (abbrev_section)); |
09406207 | 6735 | |
78d4d2c5 JK |
6736 | dwarf2_read_section (objfile, section); |
6737 | info_ptr = section->buffer; | |
348e048f | 6738 | |
78d4d2c5 JK |
6739 | if (info_ptr == NULL) |
6740 | return; | |
348e048f | 6741 | |
78d4d2c5 JK |
6742 | /* We can't set abfd until now because the section may be empty or |
6743 | not present, in which case the bfd is unknown. */ | |
6744 | abfd = get_section_bfd_owner (section); | |
348e048f | 6745 | |
78d4d2c5 JK |
6746 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
6747 | because we don't need to read any dies: the signature is in the | |
6748 | header. */ | |
3019eac3 | 6749 | |
78d4d2c5 JK |
6750 | end_ptr = info_ptr + section->size; |
6751 | while (info_ptr < end_ptr) | |
6752 | { | |
78d4d2c5 JK |
6753 | struct signatured_type *sig_type; |
6754 | struct dwo_unit *dwo_tu; | |
6755 | void **slot; | |
6756 | const gdb_byte *ptr = info_ptr; | |
6757 | struct comp_unit_head header; | |
6758 | unsigned int length; | |
8b70b953 | 6759 | |
9c541725 | 6760 | sect_offset sect_off = (sect_offset) (ptr - section->buffer); |
348e048f | 6761 | |
a49dd8dd JK |
6762 | /* Initialize it due to a false compiler warning. */ |
6763 | header.signature = -1; | |
9c541725 | 6764 | header.type_cu_offset_in_tu = (cu_offset) -1; |
a49dd8dd | 6765 | |
78d4d2c5 JK |
6766 | /* We need to read the type's signature in order to build the hash |
6767 | table, but we don't need anything else just yet. */ | |
348e048f | 6768 | |
ed2dc618 | 6769 | ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, &header, section, |
43988095 | 6770 | abbrev_section, ptr, section_kind); |
348e048f | 6771 | |
78d4d2c5 | 6772 | length = get_cu_length (&header); |
6caca83c | 6773 | |
78d4d2c5 JK |
6774 | /* Skip dummy type units. */ |
6775 | if (ptr >= info_ptr + length | |
43988095 JK |
6776 | || peek_abbrev_code (abfd, ptr) == 0 |
6777 | || header.unit_type != DW_UT_type) | |
78d4d2c5 JK |
6778 | { |
6779 | info_ptr += length; | |
6780 | continue; | |
6781 | } | |
dee91e82 | 6782 | |
78d4d2c5 JK |
6783 | if (types_htab == NULL) |
6784 | { | |
6785 | if (dwo_file) | |
6786 | types_htab = allocate_dwo_unit_table (objfile); | |
6787 | else | |
6788 | types_htab = allocate_signatured_type_table (objfile); | |
6789 | } | |
8b70b953 | 6790 | |
78d4d2c5 JK |
6791 | if (dwo_file) |
6792 | { | |
6793 | sig_type = NULL; | |
6794 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6795 | struct dwo_unit); | |
6796 | dwo_tu->dwo_file = dwo_file; | |
43988095 | 6797 | dwo_tu->signature = header.signature; |
9c541725 | 6798 | dwo_tu->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 | 6799 | dwo_tu->section = section; |
9c541725 | 6800 | dwo_tu->sect_off = sect_off; |
78d4d2c5 JK |
6801 | dwo_tu->length = length; |
6802 | } | |
6803 | else | |
6804 | { | |
6805 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
6806 | The real type_offset is in the DWO file. */ | |
6807 | dwo_tu = NULL; | |
6808 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6809 | struct signatured_type); | |
43988095 | 6810 | sig_type->signature = header.signature; |
9c541725 | 6811 | sig_type->type_offset_in_tu = header.type_cu_offset_in_tu; |
e3b94546 | 6812 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
78d4d2c5 JK |
6813 | sig_type->per_cu.is_debug_types = 1; |
6814 | sig_type->per_cu.section = section; | |
9c541725 | 6815 | sig_type->per_cu.sect_off = sect_off; |
78d4d2c5 JK |
6816 | sig_type->per_cu.length = length; |
6817 | } | |
6818 | ||
6819 | slot = htab_find_slot (types_htab, | |
6820 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
6821 | INSERT); | |
6822 | gdb_assert (slot != NULL); | |
6823 | if (*slot != NULL) | |
6824 | { | |
9c541725 | 6825 | sect_offset dup_sect_off; |
0349ea22 | 6826 | |
3019eac3 DE |
6827 | if (dwo_file) |
6828 | { | |
78d4d2c5 JK |
6829 | const struct dwo_unit *dup_tu |
6830 | = (const struct dwo_unit *) *slot; | |
6831 | ||
9c541725 | 6832 | dup_sect_off = dup_tu->sect_off; |
3019eac3 DE |
6833 | } |
6834 | else | |
6835 | { | |
78d4d2c5 JK |
6836 | const struct signatured_type *dup_tu |
6837 | = (const struct signatured_type *) *slot; | |
6838 | ||
9c541725 | 6839 | dup_sect_off = dup_tu->per_cu.sect_off; |
3019eac3 | 6840 | } |
8b70b953 | 6841 | |
b98664d3 | 6842 | complaint (_("debug type entry at offset %s is duplicate to" |
9d8780f0 SM |
6843 | " the entry at offset %s, signature %s"), |
6844 | sect_offset_str (sect_off), sect_offset_str (dup_sect_off), | |
43988095 | 6845 | hex_string (header.signature)); |
78d4d2c5 JK |
6846 | } |
6847 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; | |
3019eac3 | 6848 | |
78d4d2c5 | 6849 | if (dwarf_read_debug > 1) |
9d8780f0 SM |
6850 | fprintf_unfiltered (gdb_stdlog, " offset %s, signature %s\n", |
6851 | sect_offset_str (sect_off), | |
43988095 | 6852 | hex_string (header.signature)); |
3019eac3 | 6853 | |
78d4d2c5 JK |
6854 | info_ptr += length; |
6855 | } | |
6856 | } | |
3019eac3 | 6857 | |
78d4d2c5 JK |
6858 | /* Create the hash table of all entries in the .debug_types |
6859 | (or .debug_types.dwo) section(s). | |
6860 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
6861 | otherwise it is NULL. | |
b3c8eb43 | 6862 | |
78d4d2c5 | 6863 | The result is a pointer to the hash table or NULL if there are no types. |
348e048f | 6864 | |
78d4d2c5 | 6865 | Note: This function processes DWO files only, not DWP files. */ |
348e048f | 6866 | |
78d4d2c5 | 6867 | static void |
ed2dc618 SM |
6868 | create_debug_types_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6869 | struct dwo_file *dwo_file, | |
fd5866f6 | 6870 | gdb::array_view<dwarf2_section_info> type_sections, |
78d4d2c5 JK |
6871 | htab_t &types_htab) |
6872 | { | |
fd5866f6 SM |
6873 | for (dwarf2_section_info §ion : type_sections) |
6874 | create_debug_type_hash_table (dwarf2_per_objfile, dwo_file, §ion, | |
ed2dc618 | 6875 | types_htab, rcuh_kind::TYPE); |
3019eac3 DE |
6876 | } |
6877 | ||
6878 | /* Create the hash table of all entries in the .debug_types section, | |
6879 | and initialize all_type_units. | |
6880 | The result is zero if there is an error (e.g. missing .debug_types section), | |
6881 | otherwise non-zero. */ | |
6882 | ||
6883 | static int | |
ed2dc618 | 6884 | create_all_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
3019eac3 | 6885 | { |
78d4d2c5 | 6886 | htab_t types_htab = NULL; |
3019eac3 | 6887 | |
ed2dc618 SM |
6888 | create_debug_type_hash_table (dwarf2_per_objfile, NULL, |
6889 | &dwarf2_per_objfile->info, types_htab, | |
43988095 | 6890 | rcuh_kind::COMPILE); |
ed2dc618 SM |
6891 | create_debug_types_hash_table (dwarf2_per_objfile, NULL, |
6892 | dwarf2_per_objfile->types, types_htab); | |
3019eac3 DE |
6893 | if (types_htab == NULL) |
6894 | { | |
6895 | dwarf2_per_objfile->signatured_types = NULL; | |
6896 | return 0; | |
6897 | } | |
6898 | ||
348e048f DE |
6899 | dwarf2_per_objfile->signatured_types = types_htab; |
6900 | ||
b2bdb8cf SM |
6901 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
6902 | dwarf2_per_objfile->all_type_units.reserve (htab_elements (types_htab)); | |
6903 | ||
6904 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, | |
6905 | &dwarf2_per_objfile->all_type_units); | |
1fd400ff | 6906 | |
348e048f DE |
6907 | return 1; |
6908 | } | |
6909 | ||
6aa5f3a6 DE |
6910 | /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. |
6911 | If SLOT is non-NULL, it is the entry to use in the hash table. | |
6912 | Otherwise we find one. */ | |
6913 | ||
6914 | static struct signatured_type * | |
ed2dc618 SM |
6915 | add_type_unit (struct dwarf2_per_objfile *dwarf2_per_objfile, ULONGEST sig, |
6916 | void **slot) | |
6aa5f3a6 DE |
6917 | { |
6918 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6aa5f3a6 | 6919 | |
b2bdb8cf SM |
6920 | if (dwarf2_per_objfile->all_type_units.size () |
6921 | == dwarf2_per_objfile->all_type_units.capacity ()) | |
6922 | ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs; | |
6aa5f3a6 | 6923 | |
b2bdb8cf SM |
6924 | signatured_type *sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
6925 | struct signatured_type); | |
6926 | ||
6927 | dwarf2_per_objfile->all_type_units.push_back (sig_type); | |
6aa5f3a6 DE |
6928 | sig_type->signature = sig; |
6929 | sig_type->per_cu.is_debug_types = 1; | |
6930 | if (dwarf2_per_objfile->using_index) | |
6931 | { | |
6932 | sig_type->per_cu.v.quick = | |
6933 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6934 | struct dwarf2_per_cu_quick_data); | |
6935 | } | |
6936 | ||
6937 | if (slot == NULL) | |
6938 | { | |
6939 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
6940 | sig_type, INSERT); | |
6941 | } | |
6942 | gdb_assert (*slot == NULL); | |
6943 | *slot = sig_type; | |
6944 | /* The rest of sig_type must be filled in by the caller. */ | |
6945 | return sig_type; | |
6946 | } | |
6947 | ||
a2ce51a0 DE |
6948 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
6949 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
6950 | ||
6951 | static void | |
ed2dc618 | 6952 | fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile *dwarf2_per_objfile, |
a2ce51a0 DE |
6953 | struct signatured_type *sig_entry, |
6954 | struct dwo_unit *dwo_entry) | |
6955 | { | |
7ee85ab1 | 6956 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
6957 | gdb_assert (! sig_entry->per_cu.queued); |
6958 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
6aa5f3a6 DE |
6959 | if (dwarf2_per_objfile->using_index) |
6960 | { | |
6961 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
43f3e411 | 6962 | gdb_assert (sig_entry->per_cu.v.quick->compunit_symtab == NULL); |
6aa5f3a6 DE |
6963 | } |
6964 | else | |
6965 | gdb_assert (sig_entry->per_cu.v.psymtab == NULL); | |
a2ce51a0 | 6966 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
9c541725 | 6967 | gdb_assert (to_underlying (sig_entry->type_offset_in_section) == 0); |
a2ce51a0 | 6968 | gdb_assert (sig_entry->type_unit_group == NULL); |
7ee85ab1 DE |
6969 | gdb_assert (sig_entry->dwo_unit == NULL); |
6970 | ||
6971 | sig_entry->per_cu.section = dwo_entry->section; | |
9c541725 | 6972 | sig_entry->per_cu.sect_off = dwo_entry->sect_off; |
7ee85ab1 DE |
6973 | sig_entry->per_cu.length = dwo_entry->length; |
6974 | sig_entry->per_cu.reading_dwo_directly = 1; | |
e3b94546 | 6975 | sig_entry->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
a2ce51a0 DE |
6976 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
6977 | sig_entry->dwo_unit = dwo_entry; | |
6978 | } | |
6979 | ||
6980 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
6981 | If we haven't read the TU yet, create the signatured_type data structure |
6982 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
6983 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
6984 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
6985 | containing that CU. Otherwise we could end up reading several other DWO | |
6986 | files (due to comdat folding) to process the transitive closure of all the | |
6987 | mentioned TUs, and that can be slow. The current DWO file will have every | |
6988 | type signature that it needs. | |
a2ce51a0 DE |
6989 | We only do this for .gdb_index because in the psymtab case we already have |
6990 | to read all the DWOs to build the type unit groups. */ | |
6991 | ||
6992 | static struct signatured_type * | |
6993 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
6994 | { | |
518817b3 SM |
6995 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6996 | = cu->per_cu->dwarf2_per_objfile; | |
a2ce51a0 DE |
6997 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
6998 | struct dwo_file *dwo_file; | |
6999 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
7000 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 7001 | void **slot; |
a2ce51a0 DE |
7002 | |
7003 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
7004 | ||
6aa5f3a6 DE |
7005 | /* If TU skeletons have been removed then we may not have read in any |
7006 | TUs yet. */ | |
7007 | if (dwarf2_per_objfile->signatured_types == NULL) | |
7008 | { | |
7009 | dwarf2_per_objfile->signatured_types | |
7010 | = allocate_signatured_type_table (objfile); | |
7011 | } | |
a2ce51a0 DE |
7012 | |
7013 | /* We only ever need to read in one copy of a signatured type. | |
6aa5f3a6 DE |
7014 | Use the global signatured_types array to do our own comdat-folding |
7015 | of types. If this is the first time we're reading this TU, and | |
7016 | the TU has an entry in .gdb_index, replace the recorded data from | |
7017 | .gdb_index with this TU. */ | |
a2ce51a0 | 7018 | |
a2ce51a0 | 7019 | find_sig_entry.signature = sig; |
6aa5f3a6 DE |
7020 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, |
7021 | &find_sig_entry, INSERT); | |
9a3c8263 | 7022 | sig_entry = (struct signatured_type *) *slot; |
7ee85ab1 DE |
7023 | |
7024 | /* We can get here with the TU already read, *or* in the process of being | |
6aa5f3a6 DE |
7025 | read. Don't reassign the global entry to point to this DWO if that's |
7026 | the case. Also note that if the TU is already being read, it may not | |
7027 | have come from a DWO, the program may be a mix of Fission-compiled | |
7028 | code and non-Fission-compiled code. */ | |
7029 | ||
7030 | /* Have we already tried to read this TU? | |
7031 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
7032 | needn't exist in the global table yet). */ | |
7033 | if (sig_entry != NULL && sig_entry->per_cu.tu_read) | |
a2ce51a0 DE |
7034 | return sig_entry; |
7035 | ||
6aa5f3a6 DE |
7036 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
7037 | dwo_unit of the TU itself. */ | |
7038 | dwo_file = cu->dwo_unit->dwo_file; | |
7039 | ||
a2ce51a0 DE |
7040 | /* Ok, this is the first time we're reading this TU. */ |
7041 | if (dwo_file->tus == NULL) | |
7042 | return NULL; | |
7043 | find_dwo_entry.signature = sig; | |
9a3c8263 | 7044 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_entry); |
a2ce51a0 DE |
7045 | if (dwo_entry == NULL) |
7046 | return NULL; | |
7047 | ||
6aa5f3a6 DE |
7048 | /* If the global table doesn't have an entry for this TU, add one. */ |
7049 | if (sig_entry == NULL) | |
ed2dc618 | 7050 | sig_entry = add_type_unit (dwarf2_per_objfile, sig, slot); |
6aa5f3a6 | 7051 | |
ed2dc618 | 7052 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, sig_entry, dwo_entry); |
89e63ee4 | 7053 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
7054 | return sig_entry; |
7055 | } | |
7056 | ||
a2ce51a0 DE |
7057 | /* Subroutine of lookup_signatured_type. |
7058 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
6aa5f3a6 DE |
7059 | then try the DWP file. If the TU stub (skeleton) has been removed then |
7060 | it won't be in .gdb_index. */ | |
a2ce51a0 DE |
7061 | |
7062 | static struct signatured_type * | |
7063 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
7064 | { | |
518817b3 SM |
7065 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7066 | = cu->per_cu->dwarf2_per_objfile; | |
a2ce51a0 | 7067 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
ed2dc618 | 7068 | struct dwp_file *dwp_file = get_dwp_file (dwarf2_per_objfile); |
a2ce51a0 DE |
7069 | struct dwo_unit *dwo_entry; |
7070 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 7071 | void **slot; |
a2ce51a0 DE |
7072 | |
7073 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
7074 | gdb_assert (dwp_file != NULL); | |
7075 | ||
6aa5f3a6 DE |
7076 | /* If TU skeletons have been removed then we may not have read in any |
7077 | TUs yet. */ | |
7078 | if (dwarf2_per_objfile->signatured_types == NULL) | |
a2ce51a0 | 7079 | { |
6aa5f3a6 DE |
7080 | dwarf2_per_objfile->signatured_types |
7081 | = allocate_signatured_type_table (objfile); | |
a2ce51a0 DE |
7082 | } |
7083 | ||
6aa5f3a6 DE |
7084 | find_sig_entry.signature = sig; |
7085 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
7086 | &find_sig_entry, INSERT); | |
9a3c8263 | 7087 | sig_entry = (struct signatured_type *) *slot; |
6aa5f3a6 DE |
7088 | |
7089 | /* Have we already tried to read this TU? | |
7090 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
7091 | needn't exist in the global table yet). */ | |
7092 | if (sig_entry != NULL) | |
7093 | return sig_entry; | |
7094 | ||
a2ce51a0 DE |
7095 | if (dwp_file->tus == NULL) |
7096 | return NULL; | |
ed2dc618 | 7097 | dwo_entry = lookup_dwo_unit_in_dwp (dwarf2_per_objfile, dwp_file, NULL, |
57d63ce2 | 7098 | sig, 1 /* is_debug_types */); |
a2ce51a0 DE |
7099 | if (dwo_entry == NULL) |
7100 | return NULL; | |
7101 | ||
ed2dc618 SM |
7102 | sig_entry = add_type_unit (dwarf2_per_objfile, sig, slot); |
7103 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, sig_entry, dwo_entry); | |
a2ce51a0 | 7104 | |
a2ce51a0 DE |
7105 | return sig_entry; |
7106 | } | |
7107 | ||
380bca97 | 7108 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
7109 | Returns NULL if signature SIG is not present in the table. |
7110 | It is up to the caller to complain about this. */ | |
348e048f DE |
7111 | |
7112 | static struct signatured_type * | |
a2ce51a0 | 7113 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 7114 | { |
518817b3 SM |
7115 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7116 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 7117 | |
a2ce51a0 DE |
7118 | if (cu->dwo_unit |
7119 | && dwarf2_per_objfile->using_index) | |
7120 | { | |
7121 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
7122 | These cases require special processing. */ | |
ed2dc618 | 7123 | if (get_dwp_file (dwarf2_per_objfile) == NULL) |
a2ce51a0 DE |
7124 | return lookup_dwo_signatured_type (cu, sig); |
7125 | else | |
7126 | return lookup_dwp_signatured_type (cu, sig); | |
7127 | } | |
7128 | else | |
7129 | { | |
7130 | struct signatured_type find_entry, *entry; | |
348e048f | 7131 | |
a2ce51a0 DE |
7132 | if (dwarf2_per_objfile->signatured_types == NULL) |
7133 | return NULL; | |
7134 | find_entry.signature = sig; | |
9a3c8263 SM |
7135 | entry = ((struct signatured_type *) |
7136 | htab_find (dwarf2_per_objfile->signatured_types, &find_entry)); | |
a2ce51a0 DE |
7137 | return entry; |
7138 | } | |
348e048f | 7139 | } |
42e7ad6c DE |
7140 | \f |
7141 | /* Low level DIE reading support. */ | |
348e048f | 7142 | |
d85a05f0 DJ |
7143 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
7144 | ||
7145 | static void | |
7146 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 7147 | struct dwarf2_cu *cu, |
3019eac3 | 7148 | struct dwarf2_section_info *section, |
685af9cd TT |
7149 | struct dwo_file *dwo_file, |
7150 | struct abbrev_table *abbrev_table) | |
d85a05f0 | 7151 | { |
fceca515 | 7152 | gdb_assert (section->readin && section->buffer != NULL); |
a32a8923 | 7153 | reader->abfd = get_section_bfd_owner (section); |
d85a05f0 | 7154 | reader->cu = cu; |
3019eac3 | 7155 | reader->dwo_file = dwo_file; |
dee91e82 DE |
7156 | reader->die_section = section; |
7157 | reader->buffer = section->buffer; | |
f664829e | 7158 | reader->buffer_end = section->buffer + section->size; |
a2ce51a0 | 7159 | reader->comp_dir = NULL; |
685af9cd | 7160 | reader->abbrev_table = abbrev_table; |
d85a05f0 DJ |
7161 | } |
7162 | ||
b0c7bfa9 DE |
7163 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
7164 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. | |
7165 | There's just a lot of work to do, and init_cutu_and_read_dies is big enough | |
7166 | already. | |
7167 | ||
7168 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
7169 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
7170 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
7171 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
7172 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
7173 | STUB_COMP_DIR may be non-NULL. | |
b0c7bfa9 DE |
7174 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN |
7175 | are filled in with the info of the DIE from the DWO file. | |
685af9cd TT |
7176 | *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated |
7177 | from the dwo. Since *RESULT_READER references this abbrev table, it must be | |
7178 | kept around for at least as long as *RESULT_READER. | |
7179 | ||
b0c7bfa9 DE |
7180 | The result is non-zero if a valid (non-dummy) DIE was found. */ |
7181 | ||
7182 | static int | |
7183 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
7184 | struct dwo_unit *dwo_unit, | |
b0c7bfa9 | 7185 | struct die_info *stub_comp_unit_die, |
a2ce51a0 | 7186 | const char *stub_comp_dir, |
b0c7bfa9 | 7187 | struct die_reader_specs *result_reader, |
d521ce57 | 7188 | const gdb_byte **result_info_ptr, |
b0c7bfa9 | 7189 | struct die_info **result_comp_unit_die, |
685af9cd TT |
7190 | int *result_has_children, |
7191 | abbrev_table_up *result_dwo_abbrev_table) | |
b0c7bfa9 | 7192 | { |
ed2dc618 | 7193 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
b0c7bfa9 DE |
7194 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
7195 | struct dwarf2_cu *cu = this_cu->cu; | |
b0c7bfa9 | 7196 | bfd *abfd; |
d521ce57 | 7197 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
7198 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; |
7199 | int i,num_extra_attrs; | |
7200 | struct dwarf2_section_info *dwo_abbrev_section; | |
7201 | struct attribute *attr; | |
7202 | struct die_info *comp_unit_die; | |
7203 | ||
b0aeadb3 DE |
7204 | /* At most one of these may be provided. */ |
7205 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 7206 | |
b0c7bfa9 DE |
7207 | /* These attributes aren't processed until later: |
7208 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
7209 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
7210 | referenced later. However, these attributes are found in the stub | |
7211 | which we won't have later. In order to not impose this complication | |
7212 | on the rest of the code, we read them here and copy them to the | |
7213 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
7214 | |
7215 | stmt_list = NULL; | |
7216 | low_pc = NULL; | |
7217 | high_pc = NULL; | |
7218 | ranges = NULL; | |
7219 | comp_dir = NULL; | |
7220 | ||
7221 | if (stub_comp_unit_die != NULL) | |
7222 | { | |
7223 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
7224 | DWO file. */ | |
7225 | if (! this_cu->is_debug_types) | |
7226 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
7227 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
7228 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
7229 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
7230 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
7231 | ||
7232 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
336d760d AT |
7233 | We need the value before we can process DW_FORM_GNU_addr_index |
7234 | or DW_FORM_addrx. */ | |
b0c7bfa9 DE |
7235 | cu->addr_base = 0; |
7236 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu); | |
7237 | if (attr) | |
7238 | cu->addr_base = DW_UNSND (attr); | |
7239 | ||
7240 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
7241 | We need the value before we can process DW_AT_ranges. */ | |
7242 | cu->ranges_base = 0; | |
7243 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
7244 | if (attr) | |
7245 | cu->ranges_base = DW_UNSND (attr); | |
7246 | } | |
a2ce51a0 DE |
7247 | else if (stub_comp_dir != NULL) |
7248 | { | |
7249 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
8d749320 | 7250 | comp_dir = XOBNEW (&cu->comp_unit_obstack, struct attribute); |
a2ce51a0 DE |
7251 | comp_dir->name = DW_AT_comp_dir; |
7252 | comp_dir->form = DW_FORM_string; | |
7253 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
7254 | DW_STRING (comp_dir) = stub_comp_dir; | |
7255 | } | |
b0c7bfa9 DE |
7256 | |
7257 | /* Set up for reading the DWO CU/TU. */ | |
7258 | cu->dwo_unit = dwo_unit; | |
685af9cd | 7259 | dwarf2_section_info *section = dwo_unit->section; |
b0c7bfa9 | 7260 | dwarf2_read_section (objfile, section); |
a32a8923 | 7261 | abfd = get_section_bfd_owner (section); |
9c541725 PA |
7262 | begin_info_ptr = info_ptr = (section->buffer |
7263 | + to_underlying (dwo_unit->sect_off)); | |
b0c7bfa9 | 7264 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; |
b0c7bfa9 DE |
7265 | |
7266 | if (this_cu->is_debug_types) | |
7267 | { | |
b0c7bfa9 DE |
7268 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; |
7269 | ||
ed2dc618 SM |
7270 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
7271 | &cu->header, section, | |
b0c7bfa9 | 7272 | dwo_abbrev_section, |
43988095 | 7273 | info_ptr, rcuh_kind::TYPE); |
a2ce51a0 | 7274 | /* This is not an assert because it can be caused by bad debug info. */ |
43988095 | 7275 | if (sig_type->signature != cu->header.signature) |
a2ce51a0 DE |
7276 | { |
7277 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
9d8780f0 | 7278 | " TU at offset %s [in module %s]"), |
a2ce51a0 | 7279 | hex_string (sig_type->signature), |
43988095 | 7280 | hex_string (cu->header.signature), |
9d8780f0 | 7281 | sect_offset_str (dwo_unit->sect_off), |
a2ce51a0 DE |
7282 | bfd_get_filename (abfd)); |
7283 | } | |
9c541725 | 7284 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
7285 | /* For DWOs coming from DWP files, we don't know the CU length |
7286 | nor the type's offset in the TU until now. */ | |
7287 | dwo_unit->length = get_cu_length (&cu->header); | |
9c541725 | 7288 | dwo_unit->type_offset_in_tu = cu->header.type_cu_offset_in_tu; |
b0c7bfa9 DE |
7289 | |
7290 | /* Establish the type offset that can be used to lookup the type. | |
7291 | For DWO files, we don't know it until now. */ | |
9c541725 PA |
7292 | sig_type->type_offset_in_section |
7293 | = dwo_unit->sect_off + to_underlying (dwo_unit->type_offset_in_tu); | |
b0c7bfa9 DE |
7294 | } |
7295 | else | |
7296 | { | |
ed2dc618 SM |
7297 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
7298 | &cu->header, section, | |
b0c7bfa9 | 7299 | dwo_abbrev_section, |
43988095 | 7300 | info_ptr, rcuh_kind::COMPILE); |
9c541725 | 7301 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
7302 | /* For DWOs coming from DWP files, we don't know the CU length |
7303 | until now. */ | |
7304 | dwo_unit->length = get_cu_length (&cu->header); | |
7305 | } | |
7306 | ||
685af9cd TT |
7307 | *result_dwo_abbrev_table |
7308 | = abbrev_table_read_table (dwarf2_per_objfile, dwo_abbrev_section, | |
7309 | cu->header.abbrev_sect_off); | |
7310 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file, | |
7311 | result_dwo_abbrev_table->get ()); | |
b0c7bfa9 DE |
7312 | |
7313 | /* Read in the die, but leave space to copy over the attributes | |
7314 | from the stub. This has the benefit of simplifying the rest of | |
7315 | the code - all the work to maintain the illusion of a single | |
7316 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
7317 | num_extra_attrs = ((stmt_list != NULL) | |
7318 | + (low_pc != NULL) | |
7319 | + (high_pc != NULL) | |
7320 | + (ranges != NULL) | |
7321 | + (comp_dir != NULL)); | |
7322 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
7323 | result_has_children, num_extra_attrs); | |
7324 | ||
7325 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
7326 | comp_unit_die = *result_comp_unit_die; | |
7327 | i = comp_unit_die->num_attrs; | |
7328 | if (stmt_list != NULL) | |
7329 | comp_unit_die->attrs[i++] = *stmt_list; | |
7330 | if (low_pc != NULL) | |
7331 | comp_unit_die->attrs[i++] = *low_pc; | |
7332 | if (high_pc != NULL) | |
7333 | comp_unit_die->attrs[i++] = *high_pc; | |
7334 | if (ranges != NULL) | |
7335 | comp_unit_die->attrs[i++] = *ranges; | |
7336 | if (comp_dir != NULL) | |
7337 | comp_unit_die->attrs[i++] = *comp_dir; | |
7338 | comp_unit_die->num_attrs += num_extra_attrs; | |
7339 | ||
b4f54984 | 7340 | if (dwarf_die_debug) |
bf6af496 DE |
7341 | { |
7342 | fprintf_unfiltered (gdb_stdlog, | |
7343 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 7344 | get_section_name (section), |
bf6af496 DE |
7345 | (unsigned) (begin_info_ptr - section->buffer), |
7346 | bfd_get_filename (abfd)); | |
b4f54984 | 7347 | dump_die (comp_unit_die, dwarf_die_debug); |
bf6af496 DE |
7348 | } |
7349 | ||
a2ce51a0 DE |
7350 | /* Save the comp_dir attribute. If there is no DWP file then we'll read |
7351 | TUs by skipping the stub and going directly to the entry in the DWO file. | |
7352 | However, skipping the stub means we won't get DW_AT_comp_dir, so we have | |
7353 | to get it via circuitous means. Blech. */ | |
7354 | if (comp_dir != NULL) | |
7355 | result_reader->comp_dir = DW_STRING (comp_dir); | |
7356 | ||
b0c7bfa9 DE |
7357 | /* Skip dummy compilation units. */ |
7358 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
7359 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
7360 | return 0; | |
7361 | ||
7362 | *result_info_ptr = info_ptr; | |
7363 | return 1; | |
7364 | } | |
7365 | ||
a084a2a6 AT |
7366 | /* Return the signature of the compile unit, if found. In DWARF 4 and before, |
7367 | the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the | |
7368 | signature is part of the header. */ | |
7369 | static gdb::optional<ULONGEST> | |
7370 | lookup_dwo_id (struct dwarf2_cu *cu, struct die_info* comp_unit_die) | |
7371 | { | |
7372 | if (cu->header.version >= 5) | |
7373 | return cu->header.signature; | |
7374 | struct attribute *attr; | |
7375 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
7376 | if (attr == nullptr) | |
7377 | return gdb::optional<ULONGEST> (); | |
7378 | return DW_UNSND (attr); | |
7379 | } | |
7380 | ||
b0c7bfa9 DE |
7381 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
7382 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. | |
6a506a2d | 7383 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
7384 | |
7385 | static struct dwo_unit * | |
7386 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
7387 | struct die_info *comp_unit_die) | |
7388 | { | |
7389 | struct dwarf2_cu *cu = this_cu->cu; | |
b0c7bfa9 DE |
7390 | struct dwo_unit *dwo_unit; |
7391 | const char *comp_dir, *dwo_name; | |
7392 | ||
a2ce51a0 DE |
7393 | gdb_assert (cu != NULL); |
7394 | ||
b0c7bfa9 | 7395 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
a084a2a6 | 7396 | dwo_name = dwarf2_dwo_name (comp_unit_die, cu); |
7d45c7c3 | 7397 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
b0c7bfa9 DE |
7398 | |
7399 | if (this_cu->is_debug_types) | |
7400 | { | |
7401 | struct signatured_type *sig_type; | |
7402 | ||
7403 | /* Since this_cu is the first member of struct signatured_type, | |
7404 | we can go from a pointer to one to a pointer to the other. */ | |
7405 | sig_type = (struct signatured_type *) this_cu; | |
b0c7bfa9 DE |
7406 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); |
7407 | } | |
7408 | else | |
7409 | { | |
a084a2a6 AT |
7410 | gdb::optional<ULONGEST> signature = lookup_dwo_id (cu, comp_unit_die); |
7411 | if (!signature.has_value ()) | |
b0c7bfa9 DE |
7412 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" |
7413 | " [in module %s]"), | |
e3b94546 | 7414 | dwo_name, objfile_name (this_cu->dwarf2_per_objfile->objfile)); |
b0c7bfa9 | 7415 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, |
a084a2a6 | 7416 | *signature); |
b0c7bfa9 DE |
7417 | } |
7418 | ||
b0c7bfa9 DE |
7419 | return dwo_unit; |
7420 | } | |
7421 | ||
a2ce51a0 | 7422 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
6aa5f3a6 | 7423 | See it for a description of the parameters. |
fcd3b13d | 7424 | Read a TU directly from a DWO file, bypassing the stub. */ |
a2ce51a0 DE |
7425 | |
7426 | static void | |
6aa5f3a6 DE |
7427 | init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, |
7428 | int use_existing_cu, int keep, | |
a2ce51a0 DE |
7429 | die_reader_func_ftype *die_reader_func, |
7430 | void *data) | |
7431 | { | |
fcd3b13d | 7432 | std::unique_ptr<dwarf2_cu> new_cu; |
a2ce51a0 | 7433 | struct signatured_type *sig_type; |
a2ce51a0 DE |
7434 | struct die_reader_specs reader; |
7435 | const gdb_byte *info_ptr; | |
7436 | struct die_info *comp_unit_die; | |
7437 | int has_children; | |
ed2dc618 | 7438 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
a2ce51a0 DE |
7439 | |
7440 | /* Verify we can do the following downcast, and that we have the | |
7441 | data we need. */ | |
7442 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
7443 | sig_type = (struct signatured_type *) this_cu; | |
7444 | gdb_assert (sig_type->dwo_unit != NULL); | |
7445 | ||
6aa5f3a6 DE |
7446 | if (use_existing_cu && this_cu->cu != NULL) |
7447 | { | |
7448 | gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit); | |
6aa5f3a6 DE |
7449 | /* There's no need to do the rereading_dwo_cu handling that |
7450 | init_cutu_and_read_dies does since we don't read the stub. */ | |
7451 | } | |
7452 | else | |
7453 | { | |
7454 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
7455 | gdb_assert (this_cu->cu == NULL); | |
fcd3b13d | 7456 | new_cu.reset (new dwarf2_cu (this_cu)); |
6aa5f3a6 DE |
7457 | } |
7458 | ||
7459 | /* A future optimization, if needed, would be to use an existing | |
7460 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs | |
7461 | could share abbrev tables. */ | |
a2ce51a0 | 7462 | |
685af9cd TT |
7463 | /* The abbreviation table used by READER, this must live at least as long as |
7464 | READER. */ | |
7465 | abbrev_table_up dwo_abbrev_table; | |
7466 | ||
a2ce51a0 | 7467 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, |
a2ce51a0 DE |
7468 | NULL /* stub_comp_unit_die */, |
7469 | sig_type->dwo_unit->dwo_file->comp_dir, | |
7470 | &reader, &info_ptr, | |
685af9cd TT |
7471 | &comp_unit_die, &has_children, |
7472 | &dwo_abbrev_table) == 0) | |
a2ce51a0 DE |
7473 | { |
7474 | /* Dummy die. */ | |
a2ce51a0 DE |
7475 | return; |
7476 | } | |
7477 | ||
7478 | /* All the "real" work is done here. */ | |
7479 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
7480 | ||
6aa5f3a6 | 7481 | /* This duplicates the code in init_cutu_and_read_dies, |
a2ce51a0 DE |
7482 | but the alternative is making the latter more complex. |
7483 | This function is only for the special case of using DWO files directly: | |
7484 | no point in overly complicating the general case just to handle this. */ | |
fcd3b13d | 7485 | if (new_cu != NULL && keep) |
a2ce51a0 | 7486 | { |
fcd3b13d SM |
7487 | /* Link this CU into read_in_chain. */ |
7488 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
7489 | dwarf2_per_objfile->read_in_chain = this_cu; | |
7490 | /* The chain owns it now. */ | |
7491 | new_cu.release (); | |
a2ce51a0 | 7492 | } |
a2ce51a0 DE |
7493 | } |
7494 | ||
fd820528 | 7495 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 7496 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 7497 | |
f4dc4d17 DE |
7498 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
7499 | Otherwise the table specified in the comp unit header is read in and used. | |
7500 | This is an optimization for when we already have the abbrev table. | |
7501 | ||
dee91e82 DE |
7502 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
7503 | Otherwise, a new CU is allocated with xmalloc. | |
7504 | ||
7505 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
7506 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
7507 | ||
7508 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 7509 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 7510 | |
70221824 | 7511 | static void |
fd820528 | 7512 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 7513 | struct abbrev_table *abbrev_table, |
fd820528 | 7514 | int use_existing_cu, int keep, |
58f0c718 | 7515 | bool skip_partial, |
fd820528 DE |
7516 | die_reader_func_ftype *die_reader_func, |
7517 | void *data) | |
c906108c | 7518 | { |
ed2dc618 | 7519 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
dee91e82 | 7520 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 7521 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 7522 | bfd *abfd = get_section_bfd_owner (section); |
dee91e82 | 7523 | struct dwarf2_cu *cu; |
d521ce57 | 7524 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 7525 | struct die_reader_specs reader; |
d85a05f0 | 7526 | struct die_info *comp_unit_die; |
dee91e82 | 7527 | int has_children; |
dee91e82 | 7528 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 7529 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
7530 | /* Non-zero if CU currently points to a DWO file and we need to |
7531 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 7532 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 7533 | int rereading_dwo_cu = 0; |
c906108c | 7534 | |
b4f54984 | 7535 | if (dwarf_die_debug) |
9d8780f0 | 7536 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset %s\n", |
09406207 | 7537 | this_cu->is_debug_types ? "type" : "comp", |
9d8780f0 | 7538 | sect_offset_str (this_cu->sect_off)); |
09406207 | 7539 | |
dee91e82 DE |
7540 | if (use_existing_cu) |
7541 | gdb_assert (keep); | |
23745b47 | 7542 | |
a2ce51a0 DE |
7543 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
7544 | file (instead of going through the stub), short-circuit all of this. */ | |
7545 | if (this_cu->reading_dwo_directly) | |
7546 | { | |
7547 | /* Narrow down the scope of possibilities to have to understand. */ | |
7548 | gdb_assert (this_cu->is_debug_types); | |
7549 | gdb_assert (abbrev_table == NULL); | |
6aa5f3a6 DE |
7550 | init_tu_and_read_dwo_dies (this_cu, use_existing_cu, keep, |
7551 | die_reader_func, data); | |
a2ce51a0 DE |
7552 | return; |
7553 | } | |
7554 | ||
dee91e82 DE |
7555 | /* This is cheap if the section is already read in. */ |
7556 | dwarf2_read_section (objfile, section); | |
7557 | ||
9c541725 | 7558 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
36586728 TT |
7559 | |
7560 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 | 7561 | |
fcd3b13d | 7562 | std::unique_ptr<dwarf2_cu> new_cu; |
dee91e82 DE |
7563 | if (use_existing_cu && this_cu->cu != NULL) |
7564 | { | |
7565 | cu = this_cu->cu; | |
42e7ad6c DE |
7566 | /* If this CU is from a DWO file we need to start over, we need to |
7567 | refetch the attributes from the skeleton CU. | |
7568 | This could be optimized by retrieving those attributes from when we | |
7569 | were here the first time: the previous comp_unit_die was stored in | |
7570 | comp_unit_obstack. But there's no data yet that we need this | |
7571 | optimization. */ | |
7572 | if (cu->dwo_unit != NULL) | |
7573 | rereading_dwo_cu = 1; | |
dee91e82 DE |
7574 | } |
7575 | else | |
7576 | { | |
7577 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
7578 | gdb_assert (this_cu->cu == NULL); | |
fcd3b13d SM |
7579 | new_cu.reset (new dwarf2_cu (this_cu)); |
7580 | cu = new_cu.get (); | |
42e7ad6c | 7581 | } |
dee91e82 | 7582 | |
b0c7bfa9 | 7583 | /* Get the header. */ |
9c541725 | 7584 | if (to_underlying (cu->header.first_die_cu_offset) != 0 && !rereading_dwo_cu) |
42e7ad6c DE |
7585 | { |
7586 | /* We already have the header, there's no need to read it in again. */ | |
9c541725 | 7587 | info_ptr += to_underlying (cu->header.first_die_cu_offset); |
42e7ad6c DE |
7588 | } |
7589 | else | |
7590 | { | |
3019eac3 | 7591 | if (this_cu->is_debug_types) |
dee91e82 | 7592 | { |
ed2dc618 SM |
7593 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
7594 | &cu->header, section, | |
4bdcc0c1 | 7595 | abbrev_section, info_ptr, |
43988095 | 7596 | rcuh_kind::TYPE); |
dee91e82 | 7597 | |
42e7ad6c DE |
7598 | /* Since per_cu is the first member of struct signatured_type, |
7599 | we can go from a pointer to one to a pointer to the other. */ | |
7600 | sig_type = (struct signatured_type *) this_cu; | |
43988095 | 7601 | gdb_assert (sig_type->signature == cu->header.signature); |
9c541725 PA |
7602 | gdb_assert (sig_type->type_offset_in_tu |
7603 | == cu->header.type_cu_offset_in_tu); | |
7604 | gdb_assert (this_cu->sect_off == cu->header.sect_off); | |
dee91e82 | 7605 | |
42e7ad6c DE |
7606 | /* LENGTH has not been set yet for type units if we're |
7607 | using .gdb_index. */ | |
1ce1cefd | 7608 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
7609 | |
7610 | /* Establish the type offset that can be used to lookup the type. */ | |
9c541725 PA |
7611 | sig_type->type_offset_in_section = |
7612 | this_cu->sect_off + to_underlying (sig_type->type_offset_in_tu); | |
43988095 JK |
7613 | |
7614 | this_cu->dwarf_version = cu->header.version; | |
dee91e82 DE |
7615 | } |
7616 | else | |
7617 | { | |
ed2dc618 SM |
7618 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
7619 | &cu->header, section, | |
4bdcc0c1 | 7620 | abbrev_section, |
43988095 JK |
7621 | info_ptr, |
7622 | rcuh_kind::COMPILE); | |
dee91e82 | 7623 | |
9c541725 | 7624 | gdb_assert (this_cu->sect_off == cu->header.sect_off); |
1ce1cefd | 7625 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
43988095 | 7626 | this_cu->dwarf_version = cu->header.version; |
dee91e82 DE |
7627 | } |
7628 | } | |
10b3939b | 7629 | |
6caca83c | 7630 | /* Skip dummy compilation units. */ |
dee91e82 | 7631 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c | 7632 | || peek_abbrev_code (abfd, info_ptr) == 0) |
fcd3b13d | 7633 | return; |
6caca83c | 7634 | |
433df2d4 DE |
7635 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
7636 | And if we need to read them now, make sure they're freed when we're | |
685af9cd TT |
7637 | done (own the table through ABBREV_TABLE_HOLDER). */ |
7638 | abbrev_table_up abbrev_table_holder; | |
f4dc4d17 | 7639 | if (abbrev_table != NULL) |
685af9cd TT |
7640 | gdb_assert (cu->header.abbrev_sect_off == abbrev_table->sect_off); |
7641 | else | |
f4dc4d17 | 7642 | { |
685af9cd TT |
7643 | abbrev_table_holder |
7644 | = abbrev_table_read_table (dwarf2_per_objfile, abbrev_section, | |
7645 | cu->header.abbrev_sect_off); | |
7646 | abbrev_table = abbrev_table_holder.get (); | |
42e7ad6c | 7647 | } |
af703f96 | 7648 | |
dee91e82 | 7649 | /* Read the top level CU/TU die. */ |
685af9cd | 7650 | init_cu_die_reader (&reader, cu, section, NULL, abbrev_table); |
dee91e82 | 7651 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 7652 | |
58f0c718 TT |
7653 | if (skip_partial && comp_unit_die->tag == DW_TAG_partial_unit) |
7654 | return; | |
7655 | ||
b0c7bfa9 | 7656 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
685af9cd TT |
7657 | from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation |
7658 | table from the DWO file and pass the ownership over to us. It will be | |
7659 | referenced from READER, so we must make sure to free it after we're done | |
7660 | with READER. | |
7661 | ||
b0c7bfa9 DE |
7662 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a |
7663 | DWO CU, that this test will fail (the attribute will not be present). */ | |
a084a2a6 | 7664 | const char *dwo_name = dwarf2_dwo_name (comp_unit_die, cu); |
685af9cd | 7665 | abbrev_table_up dwo_abbrev_table; |
a084a2a6 | 7666 | if (dwo_name != nullptr) |
3019eac3 | 7667 | { |
3019eac3 | 7668 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 7669 | struct die_info *dwo_comp_unit_die; |
3019eac3 DE |
7670 | |
7671 | if (has_children) | |
6a506a2d | 7672 | { |
b98664d3 | 7673 | complaint (_("compilation unit with DW_AT_GNU_dwo_name" |
9d8780f0 SM |
7674 | " has children (offset %s) [in module %s]"), |
7675 | sect_offset_str (this_cu->sect_off), | |
7676 | bfd_get_filename (abfd)); | |
6a506a2d | 7677 | } |
b0c7bfa9 | 7678 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die); |
6a506a2d | 7679 | if (dwo_unit != NULL) |
3019eac3 | 7680 | { |
6a506a2d | 7681 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
a2ce51a0 | 7682 | comp_unit_die, NULL, |
6a506a2d | 7683 | &reader, &info_ptr, |
685af9cd TT |
7684 | &dwo_comp_unit_die, &has_children, |
7685 | &dwo_abbrev_table) == 0) | |
6a506a2d DE |
7686 | { |
7687 | /* Dummy die. */ | |
6a506a2d DE |
7688 | return; |
7689 | } | |
7690 | comp_unit_die = dwo_comp_unit_die; | |
7691 | } | |
7692 | else | |
7693 | { | |
7694 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
7695 | the stub. A complaint has already been logged. There's | |
7696 | not much more we can do except pass on the stub DIE to | |
7697 | die_reader_func. We don't want to throw an error on bad | |
7698 | debug info. */ | |
3019eac3 DE |
7699 | } |
7700 | } | |
7701 | ||
b0c7bfa9 | 7702 | /* All of the above is setup for this call. Yikes. */ |
dee91e82 DE |
7703 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
7704 | ||
b0c7bfa9 | 7705 | /* Done, clean up. */ |
fcd3b13d | 7706 | if (new_cu != NULL && keep) |
348e048f | 7707 | { |
fcd3b13d SM |
7708 | /* Link this CU into read_in_chain. */ |
7709 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
7710 | dwarf2_per_objfile->read_in_chain = this_cu; | |
7711 | /* The chain owns it now. */ | |
7712 | new_cu.release (); | |
348e048f | 7713 | } |
dee91e82 DE |
7714 | } |
7715 | ||
33e80786 DE |
7716 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present. |
7717 | DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed | |
7718 | to have already done the lookup to find the DWO file). | |
dee91e82 DE |
7719 | |
7720 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 7721 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
7722 | |
7723 | We fill in THIS_CU->length. | |
7724 | ||
7725 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
7726 | linker) then DIE_READER_FUNC will not get called. | |
7727 | ||
7728 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
7729 | This is done in order to not leave THIS_CU->cu in a state where we have |
7730 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
7731 | |
7732 | static void | |
7733 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
3019eac3 | 7734 | struct dwo_file *dwo_file, |
dee91e82 DE |
7735 | die_reader_func_ftype *die_reader_func, |
7736 | void *data) | |
7737 | { | |
ed2dc618 | 7738 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
dee91e82 | 7739 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 7740 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 7741 | bfd *abfd = get_section_bfd_owner (section); |
33e80786 | 7742 | struct dwarf2_section_info *abbrev_section; |
d521ce57 | 7743 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 7744 | struct die_reader_specs reader; |
dee91e82 DE |
7745 | struct die_info *comp_unit_die; |
7746 | int has_children; | |
7747 | ||
b4f54984 | 7748 | if (dwarf_die_debug) |
9d8780f0 | 7749 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset %s\n", |
09406207 | 7750 | this_cu->is_debug_types ? "type" : "comp", |
9d8780f0 | 7751 | sect_offset_str (this_cu->sect_off)); |
09406207 | 7752 | |
dee91e82 DE |
7753 | gdb_assert (this_cu->cu == NULL); |
7754 | ||
33e80786 DE |
7755 | abbrev_section = (dwo_file != NULL |
7756 | ? &dwo_file->sections.abbrev | |
7757 | : get_abbrev_section_for_cu (this_cu)); | |
7758 | ||
dee91e82 DE |
7759 | /* This is cheap if the section is already read in. */ |
7760 | dwarf2_read_section (objfile, section); | |
7761 | ||
fcd3b13d | 7762 | struct dwarf2_cu cu (this_cu); |
dee91e82 | 7763 | |
9c541725 | 7764 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
ed2dc618 SM |
7765 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
7766 | &cu.header, section, | |
4bdcc0c1 | 7767 | abbrev_section, info_ptr, |
43988095 JK |
7768 | (this_cu->is_debug_types |
7769 | ? rcuh_kind::TYPE | |
7770 | : rcuh_kind::COMPILE)); | |
dee91e82 | 7771 | |
1ce1cefd | 7772 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
7773 | |
7774 | /* Skip dummy compilation units. */ | |
7775 | if (info_ptr >= begin_info_ptr + this_cu->length | |
7776 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
fcd3b13d | 7777 | return; |
72bf9492 | 7778 | |
685af9cd TT |
7779 | abbrev_table_up abbrev_table |
7780 | = abbrev_table_read_table (dwarf2_per_objfile, abbrev_section, | |
7781 | cu.header.abbrev_sect_off); | |
dee91e82 | 7782 | |
685af9cd | 7783 | init_cu_die_reader (&reader, &cu, section, dwo_file, abbrev_table.get ()); |
dee91e82 DE |
7784 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
7785 | ||
7786 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
dee91e82 DE |
7787 | } |
7788 | ||
3019eac3 DE |
7789 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
7790 | does not lookup the specified DWO file. | |
7791 | This cannot be used to read DWO files. | |
dee91e82 DE |
7792 | |
7793 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
7794 | This is done in order to not leave THIS_CU->cu in a state where we have |
7795 | to care whether it refers to the "main" CU or the DWO CU. | |
7796 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
7797 | |
7798 | static void | |
7799 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
7800 | die_reader_func_ftype *die_reader_func, | |
7801 | void *data) | |
7802 | { | |
33e80786 | 7803 | init_cutu_and_read_dies_no_follow (this_cu, NULL, die_reader_func, data); |
dee91e82 | 7804 | } |
0018ea6f DE |
7805 | \f |
7806 | /* Type Unit Groups. | |
dee91e82 | 7807 | |
0018ea6f DE |
7808 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
7809 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
7810 | so that all types coming from the same compilation (.o file) are grouped | |
7811 | together. A future step could be to put the types in the same symtab as | |
7812 | the CU the types ultimately came from. */ | |
ff013f42 | 7813 | |
f4dc4d17 DE |
7814 | static hashval_t |
7815 | hash_type_unit_group (const void *item) | |
7816 | { | |
9a3c8263 SM |
7817 | const struct type_unit_group *tu_group |
7818 | = (const struct type_unit_group *) item; | |
f4dc4d17 | 7819 | |
094b34ac | 7820 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 7821 | } |
348e048f DE |
7822 | |
7823 | static int | |
f4dc4d17 | 7824 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 7825 | { |
9a3c8263 SM |
7826 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
7827 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; | |
348e048f | 7828 | |
094b34ac | 7829 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 7830 | } |
348e048f | 7831 | |
f4dc4d17 DE |
7832 | /* Allocate a hash table for type unit groups. */ |
7833 | ||
7834 | static htab_t | |
ed2dc618 | 7835 | allocate_type_unit_groups_table (struct objfile *objfile) |
f4dc4d17 DE |
7836 | { |
7837 | return htab_create_alloc_ex (3, | |
7838 | hash_type_unit_group, | |
7839 | eq_type_unit_group, | |
7840 | NULL, | |
ed2dc618 | 7841 | &objfile->objfile_obstack, |
f4dc4d17 DE |
7842 | hashtab_obstack_allocate, |
7843 | dummy_obstack_deallocate); | |
7844 | } | |
dee91e82 | 7845 | |
f4dc4d17 DE |
7846 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
7847 | partial symtabs. We combine several TUs per psymtab to not let the size | |
7848 | of any one psymtab grow too big. */ | |
7849 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
7850 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 7851 | |
094b34ac | 7852 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
7853 | Create the type_unit_group object used to hold one or more TUs. */ |
7854 | ||
7855 | static struct type_unit_group * | |
094b34ac | 7856 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 | 7857 | { |
518817b3 SM |
7858 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7859 | = cu->per_cu->dwarf2_per_objfile; | |
f4dc4d17 | 7860 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
094b34ac | 7861 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 7862 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
7863 | |
7864 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
7865 | struct type_unit_group); | |
094b34ac | 7866 | per_cu = &tu_group->per_cu; |
518817b3 | 7867 | per_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
f4dc4d17 | 7868 | |
094b34ac DE |
7869 | if (dwarf2_per_objfile->using_index) |
7870 | { | |
7871 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
7872 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
7873 | } |
7874 | else | |
7875 | { | |
9c541725 | 7876 | unsigned int line_offset = to_underlying (line_offset_struct); |
094b34ac | 7877 | struct partial_symtab *pst; |
528e1572 | 7878 | std::string name; |
094b34ac DE |
7879 | |
7880 | /* Give the symtab a useful name for debug purposes. */ | |
7881 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
528e1572 SM |
7882 | name = string_printf ("<type_units_%d>", |
7883 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
094b34ac | 7884 | else |
528e1572 | 7885 | name = string_printf ("<type_units_at_0x%x>", line_offset); |
094b34ac | 7886 | |
528e1572 | 7887 | pst = create_partial_symtab (per_cu, name.c_str ()); |
094b34ac | 7888 | pst->anonymous = 1; |
094b34ac | 7889 | } |
f4dc4d17 | 7890 | |
094b34ac | 7891 | tu_group->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 7892 | tu_group->hash.line_sect_off = line_offset_struct; |
f4dc4d17 DE |
7893 | |
7894 | return tu_group; | |
7895 | } | |
7896 | ||
094b34ac DE |
7897 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
7898 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
7899 | |
7900 | static struct type_unit_group * | |
ff39bb5e | 7901 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 | 7902 | { |
518817b3 SM |
7903 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7904 | = cu->per_cu->dwarf2_per_objfile; | |
f4dc4d17 DE |
7905 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
7906 | struct type_unit_group *tu_group; | |
7907 | void **slot; | |
7908 | unsigned int line_offset; | |
7909 | struct type_unit_group type_unit_group_for_lookup; | |
7910 | ||
7911 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
7912 | { | |
7913 | dwarf2_per_objfile->type_unit_groups = | |
ed2dc618 | 7914 | allocate_type_unit_groups_table (dwarf2_per_objfile->objfile); |
f4dc4d17 DE |
7915 | } |
7916 | ||
7917 | /* Do we need to create a new group, or can we use an existing one? */ | |
7918 | ||
7919 | if (stmt_list) | |
7920 | { | |
7921 | line_offset = DW_UNSND (stmt_list); | |
7922 | ++tu_stats->nr_symtab_sharers; | |
7923 | } | |
7924 | else | |
7925 | { | |
7926 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
7927 | We can do various things here like create one group per TU or | |
7928 | spread them over multiple groups to split up the expansion work. | |
7929 | To avoid worst case scenarios (too many groups or too large groups) | |
7930 | we, umm, group them in bunches. */ | |
7931 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
7932 | | (tu_stats->nr_stmt_less_type_units | |
7933 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
7934 | ++tu_stats->nr_stmt_less_type_units; | |
7935 | } | |
7936 | ||
094b34ac | 7937 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 7938 | type_unit_group_for_lookup.hash.line_sect_off = (sect_offset) line_offset; |
f4dc4d17 DE |
7939 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
7940 | &type_unit_group_for_lookup, INSERT); | |
7941 | if (*slot != NULL) | |
7942 | { | |
9a3c8263 | 7943 | tu_group = (struct type_unit_group *) *slot; |
f4dc4d17 DE |
7944 | gdb_assert (tu_group != NULL); |
7945 | } | |
7946 | else | |
7947 | { | |
9c541725 | 7948 | sect_offset line_offset_struct = (sect_offset) line_offset; |
094b34ac | 7949 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
7950 | *slot = tu_group; |
7951 | ++tu_stats->nr_symtabs; | |
7952 | } | |
7953 | ||
7954 | return tu_group; | |
7955 | } | |
0018ea6f DE |
7956 | \f |
7957 | /* Partial symbol tables. */ | |
7958 | ||
7959 | /* Create a psymtab named NAME and assign it to PER_CU. | |
7960 | ||
7961 | The caller must fill in the following details: | |
7962 | dirname, textlow, texthigh. */ | |
7963 | ||
7964 | static struct partial_symtab * | |
7965 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
7966 | { | |
e3b94546 | 7967 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
0018ea6f DE |
7968 | struct partial_symtab *pst; |
7969 | ||
939652a5 | 7970 | pst = start_psymtab_common (objfile, name, 0); |
0018ea6f DE |
7971 | |
7972 | pst->psymtabs_addrmap_supported = 1; | |
7973 | ||
7974 | /* This is the glue that links PST into GDB's symbol API. */ | |
7975 | pst->read_symtab_private = per_cu; | |
7976 | pst->read_symtab = dwarf2_read_symtab; | |
7977 | per_cu->v.psymtab = pst; | |
7978 | ||
7979 | return pst; | |
7980 | } | |
7981 | ||
b93601f3 TT |
7982 | /* The DATA object passed to process_psymtab_comp_unit_reader has this |
7983 | type. */ | |
7984 | ||
7985 | struct process_psymtab_comp_unit_data | |
7986 | { | |
7987 | /* True if we are reading a DW_TAG_partial_unit. */ | |
7988 | ||
7989 | int want_partial_unit; | |
7990 | ||
7991 | /* The "pretend" language that is used if the CU doesn't declare a | |
7992 | language. */ | |
7993 | ||
7994 | enum language pretend_language; | |
7995 | }; | |
7996 | ||
0018ea6f DE |
7997 | /* die_reader_func for process_psymtab_comp_unit. */ |
7998 | ||
7999 | static void | |
8000 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 8001 | const gdb_byte *info_ptr, |
0018ea6f DE |
8002 | struct die_info *comp_unit_die, |
8003 | int has_children, | |
8004 | void *data) | |
8005 | { | |
8006 | struct dwarf2_cu *cu = reader->cu; | |
518817b3 | 8007 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 8008 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
0018ea6f | 8009 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
0018ea6f DE |
8010 | CORE_ADDR baseaddr; |
8011 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
8012 | struct partial_symtab *pst; | |
3a2b436a | 8013 | enum pc_bounds_kind cu_bounds_kind; |
0018ea6f | 8014 | const char *filename; |
9a3c8263 SM |
8015 | struct process_psymtab_comp_unit_data *info |
8016 | = (struct process_psymtab_comp_unit_data *) data; | |
0018ea6f | 8017 | |
b93601f3 | 8018 | if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit) |
0018ea6f DE |
8019 | return; |
8020 | ||
8021 | gdb_assert (! per_cu->is_debug_types); | |
8022 | ||
b93601f3 | 8023 | prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language); |
0018ea6f | 8024 | |
0018ea6f | 8025 | /* Allocate a new partial symbol table structure. */ |
7d45c7c3 KB |
8026 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
8027 | if (filename == NULL) | |
0018ea6f | 8028 | filename = ""; |
0018ea6f DE |
8029 | |
8030 | pst = create_partial_symtab (per_cu, filename); | |
8031 | ||
8032 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
7d45c7c3 | 8033 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
0018ea6f DE |
8034 | |
8035 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
8036 | ||
8037 | dwarf2_find_base_address (comp_unit_die, cu); | |
8038 | ||
8039 | /* Possibly set the default values of LOWPC and HIGHPC from | |
8040 | `DW_AT_ranges'. */ | |
3a2b436a JK |
8041 | cu_bounds_kind = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
8042 | &best_highpc, cu, pst); | |
8043 | if (cu_bounds_kind == PC_BOUNDS_HIGH_LOW && best_lowpc < best_highpc) | |
79748972 TT |
8044 | { |
8045 | CORE_ADDR low | |
8046 | = (gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr) | |
8047 | - baseaddr); | |
8048 | CORE_ADDR high | |
8049 | = (gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr) | |
8050 | - baseaddr - 1); | |
8051 | /* Store the contiguous range if it is not empty; it can be | |
8052 | empty for CUs with no code. */ | |
d320c2b5 TT |
8053 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
8054 | low, high, pst); | |
79748972 | 8055 | } |
0018ea6f DE |
8056 | |
8057 | /* Check if comp unit has_children. | |
8058 | If so, read the rest of the partial symbols from this comp unit. | |
8059 | If not, there's no more debug_info for this comp unit. */ | |
8060 | if (has_children) | |
8061 | { | |
8062 | struct partial_die_info *first_die; | |
8063 | CORE_ADDR lowpc, highpc; | |
8064 | ||
8065 | lowpc = ((CORE_ADDR) -1); | |
8066 | highpc = ((CORE_ADDR) 0); | |
8067 | ||
8068 | first_die = load_partial_dies (reader, info_ptr, 1); | |
8069 | ||
8070 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
e385593e | 8071 | cu_bounds_kind <= PC_BOUNDS_INVALID, cu); |
0018ea6f DE |
8072 | |
8073 | /* If we didn't find a lowpc, set it to highpc to avoid | |
8074 | complaints from `maint check'. */ | |
8075 | if (lowpc == ((CORE_ADDR) -1)) | |
8076 | lowpc = highpc; | |
8077 | ||
8078 | /* If the compilation unit didn't have an explicit address range, | |
8079 | then use the information extracted from its child dies. */ | |
e385593e | 8080 | if (cu_bounds_kind <= PC_BOUNDS_INVALID) |
0018ea6f DE |
8081 | { |
8082 | best_lowpc = lowpc; | |
8083 | best_highpc = highpc; | |
8084 | } | |
8085 | } | |
4ae976d1 | 8086 | pst->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch, |
79748972 TT |
8087 | best_lowpc + baseaddr) |
8088 | - baseaddr); | |
4ae976d1 | 8089 | pst->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch, |
79748972 TT |
8090 | best_highpc + baseaddr) |
8091 | - baseaddr); | |
0018ea6f | 8092 | |
8763cede | 8093 | end_psymtab_common (objfile, pst); |
0018ea6f DE |
8094 | |
8095 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs)) | |
8096 | { | |
8097 | int i; | |
8098 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
8099 | struct dwarf2_per_cu_data *iter; | |
8100 | ||
8101 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
8102 | post-pass. */ | |
8103 | pst->number_of_dependencies = len; | |
a9342b62 TT |
8104 | pst->dependencies |
8105 | = objfile->partial_symtabs->allocate_dependencies (len); | |
0018ea6f DE |
8106 | for (i = 0; |
8107 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, | |
8108 | i, iter); | |
8109 | ++i) | |
8110 | pst->dependencies[i] = iter->v.psymtab; | |
8111 | ||
8112 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
8113 | } | |
8114 | ||
8115 | /* Get the list of files included in the current compilation unit, | |
8116 | and build a psymtab for each of them. */ | |
8117 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
8118 | ||
b4f54984 | 8119 | if (dwarf_read_debug) |
b926417a TT |
8120 | fprintf_unfiltered (gdb_stdlog, |
8121 | "Psymtab for %s unit @%s: %s - %s" | |
8122 | ", %d global, %d static syms\n", | |
8123 | per_cu->is_debug_types ? "type" : "comp", | |
8124 | sect_offset_str (per_cu->sect_off), | |
8125 | paddress (gdbarch, pst->text_low (objfile)), | |
8126 | paddress (gdbarch, pst->text_high (objfile)), | |
8127 | pst->n_global_syms, pst->n_static_syms); | |
0018ea6f DE |
8128 | } |
8129 | ||
8130 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
8131 | Process compilation unit THIS_CU for a psymtab. */ | |
8132 | ||
8133 | static void | |
8134 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
b93601f3 TT |
8135 | int want_partial_unit, |
8136 | enum language pretend_language) | |
0018ea6f DE |
8137 | { |
8138 | /* If this compilation unit was already read in, free the | |
8139 | cached copy in order to read it in again. This is | |
8140 | necessary because we skipped some symbols when we first | |
8141 | read in the compilation unit (see load_partial_dies). | |
8142 | This problem could be avoided, but the benefit is unclear. */ | |
8143 | if (this_cu->cu != NULL) | |
8144 | free_one_cached_comp_unit (this_cu); | |
8145 | ||
f1902523 | 8146 | if (this_cu->is_debug_types) |
58f0c718 TT |
8147 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, false, |
8148 | build_type_psymtabs_reader, NULL); | |
f1902523 JK |
8149 | else |
8150 | { | |
8151 | process_psymtab_comp_unit_data info; | |
8152 | info.want_partial_unit = want_partial_unit; | |
8153 | info.pretend_language = pretend_language; | |
58f0c718 | 8154 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, false, |
f1902523 JK |
8155 | process_psymtab_comp_unit_reader, &info); |
8156 | } | |
0018ea6f DE |
8157 | |
8158 | /* Age out any secondary CUs. */ | |
ed2dc618 | 8159 | age_cached_comp_units (this_cu->dwarf2_per_objfile); |
0018ea6f | 8160 | } |
f4dc4d17 DE |
8161 | |
8162 | /* Reader function for build_type_psymtabs. */ | |
8163 | ||
8164 | static void | |
8165 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 8166 | const gdb_byte *info_ptr, |
f4dc4d17 DE |
8167 | struct die_info *type_unit_die, |
8168 | int has_children, | |
8169 | void *data) | |
8170 | { | |
ed2dc618 | 8171 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 8172 | = reader->cu->per_cu->dwarf2_per_objfile; |
f4dc4d17 DE |
8173 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8174 | struct dwarf2_cu *cu = reader->cu; | |
8175 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 8176 | struct signatured_type *sig_type; |
f4dc4d17 DE |
8177 | struct type_unit_group *tu_group; |
8178 | struct attribute *attr; | |
8179 | struct partial_die_info *first_die; | |
8180 | CORE_ADDR lowpc, highpc; | |
8181 | struct partial_symtab *pst; | |
8182 | ||
8183 | gdb_assert (data == NULL); | |
0186c6a7 DE |
8184 | gdb_assert (per_cu->is_debug_types); |
8185 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
8186 | |
8187 | if (! has_children) | |
8188 | return; | |
8189 | ||
8190 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 8191 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 8192 | |
df07e2c7 | 8193 | if (tu_group->tus == nullptr) |
a8b3b8e9 | 8194 | tu_group->tus = new std::vector<signatured_type *>; |
df07e2c7 | 8195 | tu_group->tus->push_back (sig_type); |
f4dc4d17 DE |
8196 | |
8197 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
f4dc4d17 DE |
8198 | pst = create_partial_symtab (per_cu, ""); |
8199 | pst->anonymous = 1; | |
8200 | ||
8201 | first_die = load_partial_dies (reader, info_ptr, 1); | |
8202 | ||
8203 | lowpc = (CORE_ADDR) -1; | |
8204 | highpc = (CORE_ADDR) 0; | |
8205 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
8206 | ||
8763cede | 8207 | end_psymtab_common (objfile, pst); |
f4dc4d17 DE |
8208 | } |
8209 | ||
73051182 DE |
8210 | /* Struct used to sort TUs by their abbreviation table offset. */ |
8211 | ||
8212 | struct tu_abbrev_offset | |
8213 | { | |
b2bdb8cf SM |
8214 | tu_abbrev_offset (signatured_type *sig_type_, sect_offset abbrev_offset_) |
8215 | : sig_type (sig_type_), abbrev_offset (abbrev_offset_) | |
8216 | {} | |
8217 | ||
8218 | signatured_type *sig_type; | |
73051182 DE |
8219 | sect_offset abbrev_offset; |
8220 | }; | |
8221 | ||
484cf504 | 8222 | /* Helper routine for build_type_psymtabs_1, passed to std::sort. */ |
73051182 | 8223 | |
484cf504 TT |
8224 | static bool |
8225 | sort_tu_by_abbrev_offset (const struct tu_abbrev_offset &a, | |
8226 | const struct tu_abbrev_offset &b) | |
73051182 | 8227 | { |
484cf504 | 8228 | return a.abbrev_offset < b.abbrev_offset; |
73051182 DE |
8229 | } |
8230 | ||
8231 | /* Efficiently read all the type units. | |
8232 | This does the bulk of the work for build_type_psymtabs. | |
8233 | ||
8234 | The efficiency is because we sort TUs by the abbrev table they use and | |
8235 | only read each abbrev table once. In one program there are 200K TUs | |
8236 | sharing 8K abbrev tables. | |
8237 | ||
8238 | The main purpose of this function is to support building the | |
8239 | dwarf2_per_objfile->type_unit_groups table. | |
8240 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
8241 | can collapse the search space by grouping them by stmt_list. | |
8242 | The savings can be significant, in the same program from above the 200K TUs | |
8243 | share 8K stmt_list tables. | |
8244 | ||
8245 | FUNC is expected to call get_type_unit_group, which will create the | |
8246 | struct type_unit_group if necessary and add it to | |
8247 | dwarf2_per_objfile->type_unit_groups. */ | |
8248 | ||
8249 | static void | |
ed2dc618 | 8250 | build_type_psymtabs_1 (struct dwarf2_per_objfile *dwarf2_per_objfile) |
73051182 | 8251 | { |
73051182 | 8252 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
685af9cd | 8253 | abbrev_table_up abbrev_table; |
73051182 | 8254 | sect_offset abbrev_offset; |
73051182 DE |
8255 | |
8256 | /* It's up to the caller to not call us multiple times. */ | |
8257 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
8258 | ||
b2bdb8cf | 8259 | if (dwarf2_per_objfile->all_type_units.empty ()) |
73051182 DE |
8260 | return; |
8261 | ||
8262 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
8263 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
8264 | read each abbrev table in. | |
8265 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
8266 | This is simpler and efficient enough for now. | |
8267 | ||
8268 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
8269 | symtab to use). Typically TUs with the same abbrev offset have the same | |
8270 | stmt_list value too so in practice this should work well. | |
8271 | ||
8272 | The basic algorithm here is: | |
8273 | ||
8274 | sort TUs by abbrev table | |
8275 | for each TU with same abbrev table: | |
8276 | read abbrev table if first user | |
8277 | read TU top level DIE | |
8278 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
8279 | call FUNC */ | |
8280 | ||
b4f54984 | 8281 | if (dwarf_read_debug) |
73051182 DE |
8282 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); |
8283 | ||
8284 | /* Sort in a separate table to maintain the order of all_type_units | |
8285 | for .gdb_index: TU indices directly index all_type_units. */ | |
b2bdb8cf SM |
8286 | std::vector<tu_abbrev_offset> sorted_by_abbrev; |
8287 | sorted_by_abbrev.reserve (dwarf2_per_objfile->all_type_units.size ()); | |
8288 | ||
8289 | for (signatured_type *sig_type : dwarf2_per_objfile->all_type_units) | |
8290 | sorted_by_abbrev.emplace_back | |
8291 | (sig_type, read_abbrev_offset (dwarf2_per_objfile, | |
8292 | sig_type->per_cu.section, | |
8293 | sig_type->per_cu.sect_off)); | |
73051182 | 8294 | |
484cf504 TT |
8295 | std::sort (sorted_by_abbrev.begin (), sorted_by_abbrev.end (), |
8296 | sort_tu_by_abbrev_offset); | |
73051182 | 8297 | |
9c541725 | 8298 | abbrev_offset = (sect_offset) ~(unsigned) 0; |
73051182 | 8299 | |
b2bdb8cf | 8300 | for (const tu_abbrev_offset &tu : sorted_by_abbrev) |
73051182 | 8301 | { |
73051182 DE |
8302 | /* Switch to the next abbrev table if necessary. */ |
8303 | if (abbrev_table == NULL | |
b2bdb8cf | 8304 | || tu.abbrev_offset != abbrev_offset) |
73051182 | 8305 | { |
b2bdb8cf | 8306 | abbrev_offset = tu.abbrev_offset; |
73051182 | 8307 | abbrev_table = |
ed2dc618 SM |
8308 | abbrev_table_read_table (dwarf2_per_objfile, |
8309 | &dwarf2_per_objfile->abbrev, | |
73051182 DE |
8310 | abbrev_offset); |
8311 | ++tu_stats->nr_uniq_abbrev_tables; | |
8312 | } | |
8313 | ||
b2bdb8cf | 8314 | init_cutu_and_read_dies (&tu.sig_type->per_cu, abbrev_table.get (), |
58f0c718 | 8315 | 0, 0, false, build_type_psymtabs_reader, NULL); |
73051182 | 8316 | } |
6aa5f3a6 | 8317 | } |
73051182 | 8318 | |
6aa5f3a6 DE |
8319 | /* Print collected type unit statistics. */ |
8320 | ||
8321 | static void | |
ed2dc618 | 8322 | print_tu_stats (struct dwarf2_per_objfile *dwarf2_per_objfile) |
6aa5f3a6 DE |
8323 | { |
8324 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
8325 | ||
8326 | fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n"); | |
b2bdb8cf SM |
8327 | fprintf_unfiltered (gdb_stdlog, " %zu TUs\n", |
8328 | dwarf2_per_objfile->all_type_units.size ()); | |
6aa5f3a6 DE |
8329 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", |
8330 | tu_stats->nr_uniq_abbrev_tables); | |
8331 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
8332 | tu_stats->nr_symtabs); | |
8333 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
8334 | tu_stats->nr_symtab_sharers); | |
8335 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
8336 | tu_stats->nr_stmt_less_type_units); | |
8337 | fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n", | |
8338 | tu_stats->nr_all_type_units_reallocs); | |
73051182 DE |
8339 | } |
8340 | ||
f4dc4d17 DE |
8341 | /* Traversal function for build_type_psymtabs. */ |
8342 | ||
8343 | static int | |
8344 | build_type_psymtab_dependencies (void **slot, void *info) | |
8345 | { | |
ed2dc618 SM |
8346 | struct dwarf2_per_objfile *dwarf2_per_objfile |
8347 | = (struct dwarf2_per_objfile *) info; | |
f4dc4d17 DE |
8348 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8349 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 8350 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 8351 | struct partial_symtab *pst = per_cu->v.psymtab; |
df07e2c7 | 8352 | int len = (tu_group->tus == nullptr) ? 0 : tu_group->tus->size (); |
f4dc4d17 DE |
8353 | int i; |
8354 | ||
8355 | gdb_assert (len > 0); | |
0186c6a7 | 8356 | gdb_assert (IS_TYPE_UNIT_GROUP (per_cu)); |
f4dc4d17 DE |
8357 | |
8358 | pst->number_of_dependencies = len; | |
a9342b62 | 8359 | pst->dependencies = objfile->partial_symtabs->allocate_dependencies (len); |
df07e2c7 | 8360 | for (i = 0; i < len; ++i) |
f4dc4d17 | 8361 | { |
df07e2c7 | 8362 | struct signatured_type *iter = tu_group->tus->at (i); |
0186c6a7 DE |
8363 | gdb_assert (iter->per_cu.is_debug_types); |
8364 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 8365 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
8366 | } |
8367 | ||
df07e2c7 AB |
8368 | delete tu_group->tus; |
8369 | tu_group->tus = nullptr; | |
348e048f DE |
8370 | |
8371 | return 1; | |
8372 | } | |
8373 | ||
8374 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
8375 | Build partial symbol tables for the .debug_types comp-units. */ | |
8376 | ||
8377 | static void | |
ed2dc618 | 8378 | build_type_psymtabs (struct dwarf2_per_objfile *dwarf2_per_objfile) |
348e048f | 8379 | { |
ed2dc618 | 8380 | if (! create_all_type_units (dwarf2_per_objfile)) |
348e048f DE |
8381 | return; |
8382 | ||
ed2dc618 | 8383 | build_type_psymtabs_1 (dwarf2_per_objfile); |
6aa5f3a6 | 8384 | } |
f4dc4d17 | 8385 | |
6aa5f3a6 DE |
8386 | /* Traversal function for process_skeletonless_type_unit. |
8387 | Read a TU in a DWO file and build partial symbols for it. */ | |
8388 | ||
8389 | static int | |
8390 | process_skeletonless_type_unit (void **slot, void *info) | |
8391 | { | |
8392 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
ed2dc618 SM |
8393 | struct dwarf2_per_objfile *dwarf2_per_objfile |
8394 | = (struct dwarf2_per_objfile *) info; | |
6aa5f3a6 DE |
8395 | struct signatured_type find_entry, *entry; |
8396 | ||
8397 | /* If this TU doesn't exist in the global table, add it and read it in. */ | |
8398 | ||
8399 | if (dwarf2_per_objfile->signatured_types == NULL) | |
8400 | { | |
8401 | dwarf2_per_objfile->signatured_types | |
ed2dc618 | 8402 | = allocate_signatured_type_table (dwarf2_per_objfile->objfile); |
6aa5f3a6 DE |
8403 | } |
8404 | ||
8405 | find_entry.signature = dwo_unit->signature; | |
8406 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, &find_entry, | |
8407 | INSERT); | |
8408 | /* If we've already seen this type there's nothing to do. What's happening | |
8409 | is we're doing our own version of comdat-folding here. */ | |
8410 | if (*slot != NULL) | |
8411 | return 1; | |
8412 | ||
8413 | /* This does the job that create_all_type_units would have done for | |
8414 | this TU. */ | |
ed2dc618 SM |
8415 | entry = add_type_unit (dwarf2_per_objfile, dwo_unit->signature, slot); |
8416 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, entry, dwo_unit); | |
6aa5f3a6 DE |
8417 | *slot = entry; |
8418 | ||
8419 | /* This does the job that build_type_psymtabs_1 would have done. */ | |
58f0c718 | 8420 | init_cutu_and_read_dies (&entry->per_cu, NULL, 0, 0, false, |
6aa5f3a6 DE |
8421 | build_type_psymtabs_reader, NULL); |
8422 | ||
8423 | return 1; | |
8424 | } | |
8425 | ||
8426 | /* Traversal function for process_skeletonless_type_units. */ | |
8427 | ||
8428 | static int | |
8429 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) | |
8430 | { | |
8431 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
8432 | ||
8433 | if (dwo_file->tus != NULL) | |
8434 | { | |
8435 | htab_traverse_noresize (dwo_file->tus, | |
8436 | process_skeletonless_type_unit, info); | |
8437 | } | |
8438 | ||
8439 | return 1; | |
8440 | } | |
8441 | ||
8442 | /* Scan all TUs of DWO files, verifying we've processed them. | |
8443 | This is needed in case a TU was emitted without its skeleton. | |
8444 | Note: This can't be done until we know what all the DWO files are. */ | |
8445 | ||
8446 | static void | |
ed2dc618 | 8447 | process_skeletonless_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
6aa5f3a6 DE |
8448 | { |
8449 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ | |
ed2dc618 | 8450 | if (get_dwp_file (dwarf2_per_objfile) == NULL |
6aa5f3a6 DE |
8451 | && dwarf2_per_objfile->dwo_files != NULL) |
8452 | { | |
51ac9db5 | 8453 | htab_traverse_noresize (dwarf2_per_objfile->dwo_files.get (), |
6aa5f3a6 | 8454 | process_dwo_file_for_skeletonless_type_units, |
ed2dc618 | 8455 | dwarf2_per_objfile); |
6aa5f3a6 | 8456 | } |
348e048f DE |
8457 | } |
8458 | ||
ed2dc618 | 8459 | /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */ |
95554aad TT |
8460 | |
8461 | static void | |
ed2dc618 | 8462 | set_partial_user (struct dwarf2_per_objfile *dwarf2_per_objfile) |
95554aad | 8463 | { |
b76e467d | 8464 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
95554aad | 8465 | { |
95554aad | 8466 | struct partial_symtab *pst = per_cu->v.psymtab; |
95554aad | 8467 | |
36586728 TT |
8468 | if (pst == NULL) |
8469 | continue; | |
8470 | ||
b76e467d | 8471 | for (int j = 0; j < pst->number_of_dependencies; ++j) |
95554aad TT |
8472 | { |
8473 | /* Set the 'user' field only if it is not already set. */ | |
8474 | if (pst->dependencies[j]->user == NULL) | |
8475 | pst->dependencies[j]->user = pst; | |
8476 | } | |
8477 | } | |
8478 | } | |
8479 | ||
93311388 DE |
8480 | /* Build the partial symbol table by doing a quick pass through the |
8481 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 8482 | |
93311388 | 8483 | static void |
ed2dc618 | 8484 | dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile *dwarf2_per_objfile) |
93311388 | 8485 | { |
ed2dc618 | 8486 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
93311388 | 8487 | |
b4f54984 | 8488 | if (dwarf_read_debug) |
45cfd468 DE |
8489 | { |
8490 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 8491 | objfile_name (objfile)); |
45cfd468 DE |
8492 | } |
8493 | ||
98bfdba5 PA |
8494 | dwarf2_per_objfile->reading_partial_symbols = 1; |
8495 | ||
be391dca | 8496 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 8497 | |
93311388 DE |
8498 | /* Any cached compilation units will be linked by the per-objfile |
8499 | read_in_chain. Make sure to free them when we're done. */ | |
11ed8cad | 8500 | free_cached_comp_units freer (dwarf2_per_objfile); |
72bf9492 | 8501 | |
ed2dc618 | 8502 | build_type_psymtabs (dwarf2_per_objfile); |
348e048f | 8503 | |
ed2dc618 | 8504 | create_all_comp_units (dwarf2_per_objfile); |
c906108c | 8505 | |
60606b2c TT |
8506 | /* Create a temporary address map on a temporary obstack. We later |
8507 | copy this to the final obstack. */ | |
8268c778 | 8508 | auto_obstack temp_obstack; |
791afaa2 TT |
8509 | |
8510 | scoped_restore save_psymtabs_addrmap | |
d320c2b5 | 8511 | = make_scoped_restore (&objfile->partial_symtabs->psymtabs_addrmap, |
791afaa2 | 8512 | addrmap_create_mutable (&temp_obstack)); |
72bf9492 | 8513 | |
b76e467d SM |
8514 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
8515 | process_psymtab_comp_unit (per_cu, 0, language_minimal); | |
ff013f42 | 8516 | |
6aa5f3a6 | 8517 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
ed2dc618 | 8518 | process_skeletonless_type_units (dwarf2_per_objfile); |
6aa5f3a6 DE |
8519 | |
8520 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
8521 | if (dwarf2_per_objfile->type_unit_groups != NULL) | |
8522 | { | |
8523 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
ed2dc618 | 8524 | build_type_psymtab_dependencies, dwarf2_per_objfile); |
6aa5f3a6 DE |
8525 | } |
8526 | ||
b4f54984 | 8527 | if (dwarf_read_debug) |
ed2dc618 | 8528 | print_tu_stats (dwarf2_per_objfile); |
6aa5f3a6 | 8529 | |
ed2dc618 | 8530 | set_partial_user (dwarf2_per_objfile); |
95554aad | 8531 | |
d320c2b5 TT |
8532 | objfile->partial_symtabs->psymtabs_addrmap |
8533 | = addrmap_create_fixed (objfile->partial_symtabs->psymtabs_addrmap, | |
5923a04c | 8534 | objfile->partial_symtabs->obstack ()); |
791afaa2 TT |
8535 | /* At this point we want to keep the address map. */ |
8536 | save_psymtabs_addrmap.release (); | |
ff013f42 | 8537 | |
b4f54984 | 8538 | if (dwarf_read_debug) |
45cfd468 | 8539 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", |
4262abfb | 8540 | objfile_name (objfile)); |
ae038cb0 DJ |
8541 | } |
8542 | ||
3019eac3 | 8543 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
8544 | |
8545 | static void | |
dee91e82 | 8546 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
d521ce57 | 8547 | const gdb_byte *info_ptr, |
dee91e82 DE |
8548 | struct die_info *comp_unit_die, |
8549 | int has_children, | |
8550 | void *data) | |
ae038cb0 | 8551 | { |
dee91e82 | 8552 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 8553 | |
95554aad | 8554 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 8555 | |
ae038cb0 DJ |
8556 | /* Check if comp unit has_children. |
8557 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 8558 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 8559 | if (has_children) |
dee91e82 DE |
8560 | load_partial_dies (reader, info_ptr, 0); |
8561 | } | |
98bfdba5 | 8562 | |
dee91e82 DE |
8563 | /* Load the partial DIEs for a secondary CU into memory. |
8564 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 8565 | |
dee91e82 DE |
8566 | static void |
8567 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
8568 | { | |
58f0c718 | 8569 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, false, |
f4dc4d17 | 8570 | load_partial_comp_unit_reader, NULL); |
ae038cb0 DJ |
8571 | } |
8572 | ||
ae038cb0 | 8573 | static void |
ed2dc618 | 8574 | read_comp_units_from_section (struct dwarf2_per_objfile *dwarf2_per_objfile, |
36586728 | 8575 | struct dwarf2_section_info *section, |
f1902523 | 8576 | struct dwarf2_section_info *abbrev_section, |
b76e467d | 8577 | unsigned int is_dwz) |
ae038cb0 | 8578 | { |
d521ce57 | 8579 | const gdb_byte *info_ptr; |
ed2dc618 | 8580 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
be391dca | 8581 | |
b4f54984 | 8582 | if (dwarf_read_debug) |
bf6af496 | 8583 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", |
a32a8923 DE |
8584 | get_section_name (section), |
8585 | get_section_file_name (section)); | |
bf6af496 | 8586 | |
36586728 | 8587 | dwarf2_read_section (objfile, section); |
ae038cb0 | 8588 | |
36586728 | 8589 | info_ptr = section->buffer; |
6e70227d | 8590 | |
36586728 | 8591 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 8592 | { |
ae038cb0 | 8593 | struct dwarf2_per_cu_data *this_cu; |
ae038cb0 | 8594 | |
9c541725 | 8595 | sect_offset sect_off = (sect_offset) (info_ptr - section->buffer); |
ae038cb0 | 8596 | |
f1902523 | 8597 | comp_unit_head cu_header; |
ed2dc618 SM |
8598 | read_and_check_comp_unit_head (dwarf2_per_objfile, &cu_header, section, |
8599 | abbrev_section, info_ptr, | |
8600 | rcuh_kind::COMPILE); | |
ae038cb0 DJ |
8601 | |
8602 | /* Save the compilation unit for later lookup. */ | |
f1902523 JK |
8603 | if (cu_header.unit_type != DW_UT_type) |
8604 | { | |
8605 | this_cu = XOBNEW (&objfile->objfile_obstack, | |
8606 | struct dwarf2_per_cu_data); | |
8607 | memset (this_cu, 0, sizeof (*this_cu)); | |
8608 | } | |
8609 | else | |
8610 | { | |
8611 | auto sig_type = XOBNEW (&objfile->objfile_obstack, | |
8612 | struct signatured_type); | |
8613 | memset (sig_type, 0, sizeof (*sig_type)); | |
8614 | sig_type->signature = cu_header.signature; | |
8615 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
8616 | this_cu = &sig_type->per_cu; | |
8617 | } | |
8618 | this_cu->is_debug_types = (cu_header.unit_type == DW_UT_type); | |
9c541725 | 8619 | this_cu->sect_off = sect_off; |
f1902523 | 8620 | this_cu->length = cu_header.length + cu_header.initial_length_size; |
36586728 | 8621 | this_cu->is_dwz = is_dwz; |
e3b94546 | 8622 | this_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
8a0459fd | 8623 | this_cu->section = section; |
ae038cb0 | 8624 | |
b76e467d | 8625 | dwarf2_per_objfile->all_comp_units.push_back (this_cu); |
ae038cb0 DJ |
8626 | |
8627 | info_ptr = info_ptr + this_cu->length; | |
8628 | } | |
36586728 TT |
8629 | } |
8630 | ||
8631 | /* Create a list of all compilation units in OBJFILE. | |
8632 | This is only done for -readnow and building partial symtabs. */ | |
8633 | ||
8634 | static void | |
ed2dc618 | 8635 | create_all_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
36586728 | 8636 | { |
b76e467d | 8637 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
ed2dc618 | 8638 | read_comp_units_from_section (dwarf2_per_objfile, &dwarf2_per_objfile->info, |
b76e467d | 8639 | &dwarf2_per_objfile->abbrev, 0); |
36586728 | 8640 | |
b76e467d | 8641 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
4db1a1dc | 8642 | if (dwz != NULL) |
ed2dc618 | 8643 | read_comp_units_from_section (dwarf2_per_objfile, &dwz->info, &dwz->abbrev, |
b76e467d | 8644 | 1); |
c906108c SS |
8645 | } |
8646 | ||
5734ee8b | 8647 | /* Process all loaded DIEs for compilation unit CU, starting at |
cdc07690 | 8648 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
5734ee8b | 8649 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
cdc07690 YQ |
8650 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
8651 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ | |
c906108c | 8652 | |
72bf9492 DJ |
8653 | static void |
8654 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
cdc07690 YQ |
8655 | CORE_ADDR *highpc, int set_addrmap, |
8656 | struct dwarf2_cu *cu) | |
c906108c | 8657 | { |
72bf9492 | 8658 | struct partial_die_info *pdi; |
c906108c | 8659 | |
91c24f0a DC |
8660 | /* Now, march along the PDI's, descending into ones which have |
8661 | interesting children but skipping the children of the other ones, | |
8662 | until we reach the end of the compilation unit. */ | |
c906108c | 8663 | |
72bf9492 | 8664 | pdi = first_die; |
91c24f0a | 8665 | |
72bf9492 DJ |
8666 | while (pdi != NULL) |
8667 | { | |
52356b79 | 8668 | pdi->fixup (cu); |
c906108c | 8669 | |
f55ee35c | 8670 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
8671 | children, so we need to look at them. Ditto for anonymous |
8672 | enums. */ | |
933c6fe4 | 8673 | |
72bf9492 | 8674 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad | 8675 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
b1dc1806 XR |
8676 | || pdi->tag == DW_TAG_imported_unit |
8677 | || pdi->tag == DW_TAG_inlined_subroutine) | |
c906108c | 8678 | { |
72bf9492 | 8679 | switch (pdi->tag) |
c906108c SS |
8680 | { |
8681 | case DW_TAG_subprogram: | |
b1dc1806 | 8682 | case DW_TAG_inlined_subroutine: |
cdc07690 | 8683 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
c906108c | 8684 | break; |
72929c62 | 8685 | case DW_TAG_constant: |
c906108c SS |
8686 | case DW_TAG_variable: |
8687 | case DW_TAG_typedef: | |
91c24f0a | 8688 | case DW_TAG_union_type: |
72bf9492 | 8689 | if (!pdi->is_declaration) |
63d06c5c | 8690 | { |
72bf9492 | 8691 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
8692 | } |
8693 | break; | |
c906108c | 8694 | case DW_TAG_class_type: |
680b30c7 | 8695 | case DW_TAG_interface_type: |
c906108c | 8696 | case DW_TAG_structure_type: |
72bf9492 | 8697 | if (!pdi->is_declaration) |
c906108c | 8698 | { |
72bf9492 | 8699 | add_partial_symbol (pdi, cu); |
c906108c | 8700 | } |
b7fee5a3 KS |
8701 | if ((cu->language == language_rust |
8702 | || cu->language == language_cplus) && pdi->has_children) | |
e98c9e7c TT |
8703 | scan_partial_symbols (pdi->die_child, lowpc, highpc, |
8704 | set_addrmap, cu); | |
c906108c | 8705 | break; |
91c24f0a | 8706 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
8707 | if (!pdi->is_declaration) |
8708 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
8709 | break; |
8710 | case DW_TAG_base_type: | |
a02abb62 | 8711 | case DW_TAG_subrange_type: |
c906108c | 8712 | /* File scope base type definitions are added to the partial |
c5aa993b | 8713 | symbol table. */ |
72bf9492 | 8714 | add_partial_symbol (pdi, cu); |
c906108c | 8715 | break; |
d9fa45fe | 8716 | case DW_TAG_namespace: |
cdc07690 | 8717 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
91c24f0a | 8718 | break; |
5d7cb8df | 8719 | case DW_TAG_module: |
cdc07690 | 8720 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); |
5d7cb8df | 8721 | break; |
95554aad TT |
8722 | case DW_TAG_imported_unit: |
8723 | { | |
8724 | struct dwarf2_per_cu_data *per_cu; | |
8725 | ||
f4dc4d17 DE |
8726 | /* For now we don't handle imported units in type units. */ |
8727 | if (cu->per_cu->is_debug_types) | |
8728 | { | |
8729 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
8730 | " supported in type units [in module %s]"), | |
518817b3 | 8731 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
f4dc4d17 DE |
8732 | } |
8733 | ||
e3b94546 SM |
8734 | per_cu = dwarf2_find_containing_comp_unit |
8735 | (pdi->d.sect_off, pdi->is_dwz, | |
518817b3 | 8736 | cu->per_cu->dwarf2_per_objfile); |
95554aad TT |
8737 | |
8738 | /* Go read the partial unit, if needed. */ | |
8739 | if (per_cu->v.psymtab == NULL) | |
b93601f3 | 8740 | process_psymtab_comp_unit (per_cu, 1, cu->language); |
95554aad | 8741 | |
f4dc4d17 | 8742 | VEC_safe_push (dwarf2_per_cu_ptr, |
796a7ff8 | 8743 | cu->per_cu->imported_symtabs, per_cu); |
95554aad TT |
8744 | } |
8745 | break; | |
74921315 KS |
8746 | case DW_TAG_imported_declaration: |
8747 | add_partial_symbol (pdi, cu); | |
8748 | break; | |
c906108c SS |
8749 | default: |
8750 | break; | |
8751 | } | |
8752 | } | |
8753 | ||
72bf9492 DJ |
8754 | /* If the die has a sibling, skip to the sibling. */ |
8755 | ||
8756 | pdi = pdi->die_sibling; | |
8757 | } | |
8758 | } | |
8759 | ||
8760 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 8761 | |
72bf9492 | 8762 | Normally, this is simple. For C++, the parent DIE's fully scoped |
9c37b5ae | 8763 | name is concatenated with "::" and the partial DIE's name. |
72bf9492 DJ |
8764 | Enumerators are an exception; they use the scope of their parent |
8765 | enumeration type, i.e. the name of the enumeration type is not | |
8766 | prepended to the enumerator. | |
91c24f0a | 8767 | |
72bf9492 DJ |
8768 | There are two complexities. One is DW_AT_specification; in this |
8769 | case "parent" means the parent of the target of the specification, | |
8770 | instead of the direct parent of the DIE. The other is compilers | |
8771 | which do not emit DW_TAG_namespace; in this case we try to guess | |
8772 | the fully qualified name of structure types from their members' | |
8773 | linkage names. This must be done using the DIE's children rather | |
8774 | than the children of any DW_AT_specification target. We only need | |
8775 | to do this for structures at the top level, i.e. if the target of | |
8776 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
8777 | have a parent. */ | |
8778 | ||
8779 | /* Compute the scope prefix associated with PDI's parent, in | |
8780 | compilation unit CU. The result will be allocated on CU's | |
8781 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
8782 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 8783 | static const char * |
72bf9492 DJ |
8784 | partial_die_parent_scope (struct partial_die_info *pdi, |
8785 | struct dwarf2_cu *cu) | |
8786 | { | |
15d034d0 | 8787 | const char *grandparent_scope; |
72bf9492 | 8788 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 8789 | |
72bf9492 DJ |
8790 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
8791 | then this means the parent of the specification DIE. */ | |
8792 | ||
8793 | real_pdi = pdi; | |
72bf9492 | 8794 | while (real_pdi->has_specification) |
fb816e8b | 8795 | { |
122cf0f2 AB |
8796 | auto res = find_partial_die (real_pdi->spec_offset, |
8797 | real_pdi->spec_is_dwz, cu); | |
fb816e8b TV |
8798 | real_pdi = res.pdi; |
8799 | cu = res.cu; | |
8800 | } | |
72bf9492 DJ |
8801 | |
8802 | parent = real_pdi->die_parent; | |
8803 | if (parent == NULL) | |
8804 | return NULL; | |
8805 | ||
8806 | if (parent->scope_set) | |
8807 | return parent->scope; | |
8808 | ||
52356b79 | 8809 | parent->fixup (cu); |
72bf9492 | 8810 | |
10b3939b | 8811 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 8812 | |
acebe513 UW |
8813 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
8814 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
8815 | Work around this problem here. */ | |
8816 | if (cu->language == language_cplus | |
6e70227d | 8817 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
8818 | && strcmp (parent->name, "::") == 0 |
8819 | && grandparent_scope == NULL) | |
8820 | { | |
8821 | parent->scope = NULL; | |
8822 | parent->scope_set = 1; | |
8823 | return NULL; | |
8824 | } | |
8825 | ||
0a4b0913 | 8826 | /* Nested subroutines in Fortran get a prefix. */ |
9c6c53f7 SA |
8827 | if (pdi->tag == DW_TAG_enumerator) |
8828 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
8829 | parent->scope = grandparent_scope; | |
8830 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 8831 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
8832 | || parent->tag == DW_TAG_structure_type |
8833 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 8834 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a | 8835 | || parent->tag == DW_TAG_union_type |
0a4b0913 AB |
8836 | || parent->tag == DW_TAG_enumeration_type |
8837 | || (cu->language == language_fortran | |
8838 | && parent->tag == DW_TAG_subprogram | |
8839 | && pdi->tag == DW_TAG_subprogram)) | |
72bf9492 DJ |
8840 | { |
8841 | if (grandparent_scope == NULL) | |
8842 | parent->scope = parent->name; | |
8843 | else | |
3e43a32a MS |
8844 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
8845 | grandparent_scope, | |
f55ee35c | 8846 | parent->name, 0, cu); |
72bf9492 | 8847 | } |
72bf9492 DJ |
8848 | else |
8849 | { | |
8850 | /* FIXME drow/2004-04-01: What should we be doing with | |
8851 | function-local names? For partial symbols, we should probably be | |
8852 | ignoring them. */ | |
fa9c3fa0 TT |
8853 | complaint (_("unhandled containing DIE tag %s for DIE at %s"), |
8854 | dwarf_tag_name (parent->tag), | |
8855 | sect_offset_str (pdi->sect_off)); | |
72bf9492 | 8856 | parent->scope = grandparent_scope; |
c906108c SS |
8857 | } |
8858 | ||
72bf9492 DJ |
8859 | parent->scope_set = 1; |
8860 | return parent->scope; | |
8861 | } | |
8862 | ||
8863 | /* Return the fully scoped name associated with PDI, from compilation unit | |
8864 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 8865 | |
72bf9492 DJ |
8866 | static char * |
8867 | partial_die_full_name (struct partial_die_info *pdi, | |
8868 | struct dwarf2_cu *cu) | |
8869 | { | |
15d034d0 | 8870 | const char *parent_scope; |
72bf9492 | 8871 | |
98bfdba5 PA |
8872 | /* If this is a template instantiation, we can not work out the |
8873 | template arguments from partial DIEs. So, unfortunately, we have | |
8874 | to go through the full DIEs. At least any work we do building | |
8875 | types here will be reused if full symbols are loaded later. */ | |
8876 | if (pdi->has_template_arguments) | |
8877 | { | |
52356b79 | 8878 | pdi->fixup (cu); |
98bfdba5 PA |
8879 | |
8880 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
8881 | { | |
8882 | struct die_info *die; | |
8883 | struct attribute attr; | |
8884 | struct dwarf2_cu *ref_cu = cu; | |
8885 | ||
b64f50a1 | 8886 | /* DW_FORM_ref_addr is using section offset. */ |
b4069958 | 8887 | attr.name = (enum dwarf_attribute) 0; |
98bfdba5 | 8888 | attr.form = DW_FORM_ref_addr; |
9c541725 | 8889 | attr.u.unsnd = to_underlying (pdi->sect_off); |
98bfdba5 PA |
8890 | die = follow_die_ref (NULL, &attr, &ref_cu); |
8891 | ||
8892 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); | |
8893 | } | |
8894 | } | |
8895 | ||
72bf9492 DJ |
8896 | parent_scope = partial_die_parent_scope (pdi, cu); |
8897 | if (parent_scope == NULL) | |
8898 | return NULL; | |
8899 | else | |
f55ee35c | 8900 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
c906108c SS |
8901 | } |
8902 | ||
8903 | static void | |
72bf9492 | 8904 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 8905 | { |
518817b3 SM |
8906 | struct dwarf2_per_objfile *dwarf2_per_objfile |
8907 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 8908 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 8909 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 8910 | CORE_ADDR addr = 0; |
15d034d0 | 8911 | const char *actual_name = NULL; |
e142c38c | 8912 | CORE_ADDR baseaddr; |
15d034d0 | 8913 | char *built_actual_name; |
e142c38c DJ |
8914 | |
8915 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 8916 | |
15d034d0 TT |
8917 | built_actual_name = partial_die_full_name (pdi, cu); |
8918 | if (built_actual_name != NULL) | |
8919 | actual_name = built_actual_name; | |
63d06c5c | 8920 | |
72bf9492 DJ |
8921 | if (actual_name == NULL) |
8922 | actual_name = pdi->name; | |
8923 | ||
c906108c SS |
8924 | switch (pdi->tag) |
8925 | { | |
b1dc1806 | 8926 | case DW_TAG_inlined_subroutine: |
c906108c | 8927 | case DW_TAG_subprogram: |
79748972 TT |
8928 | addr = (gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr) |
8929 | - baseaddr); | |
0a4b0913 AB |
8930 | if (pdi->is_external |
8931 | || cu->language == language_ada | |
8932 | || (cu->language == language_fortran | |
8933 | && pdi->die_parent != NULL | |
8934 | && pdi->die_parent->tag == DW_TAG_subprogram)) | |
8935 | { | |
8936 | /* Normally, only "external" DIEs are part of the global scope. | |
8937 | But in Ada and Fortran, we want to be able to access nested | |
8938 | procedures globally. So all Ada and Fortran subprograms are | |
8939 | stored in the global scope. */ | |
f47fb265 | 8940 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8941 | built_actual_name != NULL, |
f47fb265 | 8942 | VAR_DOMAIN, LOC_BLOCK, |
79748972 | 8943 | SECT_OFF_TEXT (objfile), |
75aedd27 | 8944 | psymbol_placement::GLOBAL, |
79748972 TT |
8945 | addr, |
8946 | cu->language, objfile); | |
c906108c SS |
8947 | } |
8948 | else | |
8949 | { | |
f47fb265 | 8950 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8951 | built_actual_name != NULL, |
f47fb265 | 8952 | VAR_DOMAIN, LOC_BLOCK, |
79748972 | 8953 | SECT_OFF_TEXT (objfile), |
75aedd27 | 8954 | psymbol_placement::STATIC, |
1762568f | 8955 | addr, cu->language, objfile); |
c906108c | 8956 | } |
0c1b455e TT |
8957 | |
8958 | if (pdi->main_subprogram && actual_name != NULL) | |
8959 | set_objfile_main_name (objfile, actual_name, cu->language); | |
c906108c | 8960 | break; |
72929c62 | 8961 | case DW_TAG_constant: |
75aedd27 TT |
8962 | add_psymbol_to_list (actual_name, strlen (actual_name), |
8963 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, | |
8964 | -1, (pdi->is_external | |
8965 | ? psymbol_placement::GLOBAL | |
8966 | : psymbol_placement::STATIC), | |
8967 | 0, cu->language, objfile); | |
72929c62 | 8968 | break; |
c906108c | 8969 | case DW_TAG_variable: |
95554aad TT |
8970 | if (pdi->d.locdesc) |
8971 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 8972 | |
95554aad | 8973 | if (pdi->d.locdesc |
caac4577 JG |
8974 | && addr == 0 |
8975 | && !dwarf2_per_objfile->has_section_at_zero) | |
8976 | { | |
8977 | /* A global or static variable may also have been stripped | |
8978 | out by the linker if unused, in which case its address | |
8979 | will be nullified; do not add such variables into partial | |
8980 | symbol table then. */ | |
8981 | } | |
8982 | else if (pdi->is_external) | |
c906108c SS |
8983 | { |
8984 | /* Global Variable. | |
8985 | Don't enter into the minimal symbol tables as there is | |
8986 | a minimal symbol table entry from the ELF symbols already. | |
8987 | Enter into partial symbol table if it has a location | |
8988 | descriptor or a type. | |
8989 | If the location descriptor is missing, new_symbol will create | |
8990 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
8991 | be determined from the minimal symbol table whenever the variable | |
8992 | is referenced. | |
8993 | The address for the partial symbol table entry is not | |
8994 | used by GDB, but it comes in handy for debugging partial symbol | |
8995 | table building. */ | |
8996 | ||
95554aad | 8997 | if (pdi->d.locdesc || pdi->has_type) |
f47fb265 | 8998 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8999 | built_actual_name != NULL, |
f47fb265 | 9000 | VAR_DOMAIN, LOC_STATIC, |
79748972 | 9001 | SECT_OFF_TEXT (objfile), |
75aedd27 | 9002 | psymbol_placement::GLOBAL, |
79748972 | 9003 | addr, cu->language, objfile); |
c906108c SS |
9004 | } |
9005 | else | |
9006 | { | |
ff908ebf AW |
9007 | int has_loc = pdi->d.locdesc != NULL; |
9008 | ||
9009 | /* Static Variable. Skip symbols whose value we cannot know (those | |
9010 | without location descriptors or constant values). */ | |
9011 | if (!has_loc && !pdi->has_const_value) | |
decbce07 | 9012 | { |
15d034d0 | 9013 | xfree (built_actual_name); |
decbce07 MS |
9014 | return; |
9015 | } | |
ff908ebf | 9016 | |
f47fb265 | 9017 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 9018 | built_actual_name != NULL, |
f47fb265 | 9019 | VAR_DOMAIN, LOC_STATIC, |
79748972 | 9020 | SECT_OFF_TEXT (objfile), |
75aedd27 | 9021 | psymbol_placement::STATIC, |
79748972 | 9022 | has_loc ? addr : 0, |
f47fb265 | 9023 | cu->language, objfile); |
c906108c SS |
9024 | } |
9025 | break; | |
9026 | case DW_TAG_typedef: | |
9027 | case DW_TAG_base_type: | |
a02abb62 | 9028 | case DW_TAG_subrange_type: |
38d518c9 | 9029 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 9030 | built_actual_name != NULL, |
79748972 | 9031 | VAR_DOMAIN, LOC_TYPEDEF, -1, |
75aedd27 | 9032 | psymbol_placement::STATIC, |
1762568f | 9033 | 0, cu->language, objfile); |
c906108c | 9034 | break; |
74921315 | 9035 | case DW_TAG_imported_declaration: |
72bf9492 DJ |
9036 | case DW_TAG_namespace: |
9037 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
15d034d0 | 9038 | built_actual_name != NULL, |
79748972 | 9039 | VAR_DOMAIN, LOC_TYPEDEF, -1, |
75aedd27 | 9040 | psymbol_placement::GLOBAL, |
1762568f | 9041 | 0, cu->language, objfile); |
72bf9492 | 9042 | break; |
530e8392 | 9043 | case DW_TAG_module: |
a5fd13a9 BH |
9044 | /* With Fortran 77 there might be a "BLOCK DATA" module |
9045 | available without any name. If so, we skip the module as it | |
9046 | doesn't bring any value. */ | |
9047 | if (actual_name != nullptr) | |
9048 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
9049 | built_actual_name != NULL, | |
9050 | MODULE_DOMAIN, LOC_TYPEDEF, -1, | |
9051 | psymbol_placement::GLOBAL, | |
9052 | 0, cu->language, objfile); | |
530e8392 | 9053 | break; |
c906108c | 9054 | case DW_TAG_class_type: |
680b30c7 | 9055 | case DW_TAG_interface_type: |
c906108c SS |
9056 | case DW_TAG_structure_type: |
9057 | case DW_TAG_union_type: | |
9058 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
9059 | /* Skip external references. The DWARF standard says in the section |
9060 | about "Structure, Union, and Class Type Entries": "An incomplete | |
9061 | structure, union or class type is represented by a structure, | |
9062 | union or class entry that does not have a byte size attribute | |
9063 | and that has a DW_AT_declaration attribute." */ | |
9064 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 | 9065 | { |
15d034d0 | 9066 | xfree (built_actual_name); |
decbce07 MS |
9067 | return; |
9068 | } | |
fa4028e9 | 9069 | |
63d06c5c DC |
9070 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
9071 | static vs. global. */ | |
38d518c9 | 9072 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 9073 | built_actual_name != NULL, |
79748972 | 9074 | STRUCT_DOMAIN, LOC_TYPEDEF, -1, |
9c37b5ae | 9075 | cu->language == language_cplus |
75aedd27 TT |
9076 | ? psymbol_placement::GLOBAL |
9077 | : psymbol_placement::STATIC, | |
1762568f | 9078 | 0, cu->language, objfile); |
c906108c | 9079 | |
c906108c SS |
9080 | break; |
9081 | case DW_TAG_enumerator: | |
38d518c9 | 9082 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 9083 | built_actual_name != NULL, |
79748972 | 9084 | VAR_DOMAIN, LOC_CONST, -1, |
9c37b5ae | 9085 | cu->language == language_cplus |
75aedd27 TT |
9086 | ? psymbol_placement::GLOBAL |
9087 | : psymbol_placement::STATIC, | |
1762568f | 9088 | 0, cu->language, objfile); |
c906108c SS |
9089 | break; |
9090 | default: | |
9091 | break; | |
9092 | } | |
5c4e30ca | 9093 | |
15d034d0 | 9094 | xfree (built_actual_name); |
c906108c SS |
9095 | } |
9096 | ||
5c4e30ca DC |
9097 | /* Read a partial die corresponding to a namespace; also, add a symbol |
9098 | corresponding to that namespace to the symbol table. NAMESPACE is | |
9099 | the name of the enclosing namespace. */ | |
91c24f0a | 9100 | |
72bf9492 DJ |
9101 | static void |
9102 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 9103 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
cdc07690 | 9104 | int set_addrmap, struct dwarf2_cu *cu) |
91c24f0a | 9105 | { |
72bf9492 | 9106 | /* Add a symbol for the namespace. */ |
e7c27a73 | 9107 | |
72bf9492 | 9108 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
9109 | |
9110 | /* Now scan partial symbols in that namespace. */ | |
9111 | ||
91c24f0a | 9112 | if (pdi->has_children) |
cdc07690 | 9113 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
91c24f0a DC |
9114 | } |
9115 | ||
5d7cb8df JK |
9116 | /* Read a partial die corresponding to a Fortran module. */ |
9117 | ||
9118 | static void | |
9119 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
cdc07690 | 9120 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
5d7cb8df | 9121 | { |
530e8392 KB |
9122 | /* Add a symbol for the namespace. */ |
9123 | ||
9124 | add_partial_symbol (pdi, cu); | |
9125 | ||
f55ee35c | 9126 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
9127 | |
9128 | if (pdi->has_children) | |
cdc07690 | 9129 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
5d7cb8df JK |
9130 | } |
9131 | ||
b1dc1806 XR |
9132 | /* Read a partial die corresponding to a subprogram or an inlined |
9133 | subprogram and create a partial symbol for that subprogram. | |
9134 | When the CU language allows it, this routine also defines a partial | |
9135 | symbol for each nested subprogram that this subprogram contains. | |
9136 | If SET_ADDRMAP is true, record the covered ranges in the addrmap. | |
9137 | Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI. | |
6e70227d | 9138 | |
cdc07690 YQ |
9139 | PDI may also be a lexical block, in which case we simply search |
9140 | recursively for subprograms defined inside that lexical block. | |
bc30ff58 JB |
9141 | Again, this is only performed when the CU language allows this |
9142 | type of definitions. */ | |
9143 | ||
9144 | static void | |
9145 | add_partial_subprogram (struct partial_die_info *pdi, | |
9146 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 9147 | int set_addrmap, struct dwarf2_cu *cu) |
bc30ff58 | 9148 | { |
b1dc1806 | 9149 | if (pdi->tag == DW_TAG_subprogram || pdi->tag == DW_TAG_inlined_subroutine) |
bc30ff58 JB |
9150 | { |
9151 | if (pdi->has_pc_info) | |
9152 | { | |
9153 | if (pdi->lowpc < *lowpc) | |
9154 | *lowpc = pdi->lowpc; | |
9155 | if (pdi->highpc > *highpc) | |
9156 | *highpc = pdi->highpc; | |
cdc07690 | 9157 | if (set_addrmap) |
5734ee8b | 9158 | { |
518817b3 | 9159 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a MR |
9160 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9161 | CORE_ADDR baseaddr; | |
b926417a TT |
9162 | CORE_ADDR this_highpc; |
9163 | CORE_ADDR this_lowpc; | |
5734ee8b DJ |
9164 | |
9165 | baseaddr = ANOFFSET (objfile->section_offsets, | |
9166 | SECT_OFF_TEXT (objfile)); | |
b926417a TT |
9167 | this_lowpc |
9168 | = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
9169 | pdi->lowpc + baseaddr) | |
9170 | - baseaddr); | |
9171 | this_highpc | |
9172 | = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
9173 | pdi->highpc + baseaddr) | |
9174 | - baseaddr); | |
d320c2b5 | 9175 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
b926417a | 9176 | this_lowpc, this_highpc - 1, |
9291a0cd | 9177 | cu->per_cu->v.psymtab); |
5734ee8b | 9178 | } |
481860b3 GB |
9179 | } |
9180 | ||
9181 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
9182 | { | |
bc30ff58 | 9183 | if (!pdi->is_declaration) |
e8d05480 JB |
9184 | /* Ignore subprogram DIEs that do not have a name, they are |
9185 | illegal. Do not emit a complaint at this point, we will | |
9186 | do so when we convert this psymtab into a symtab. */ | |
9187 | if (pdi->name) | |
9188 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
9189 | } |
9190 | } | |
6e70227d | 9191 | |
bc30ff58 JB |
9192 | if (! pdi->has_children) |
9193 | return; | |
9194 | ||
0a4b0913 | 9195 | if (cu->language == language_ada || cu->language == language_fortran) |
bc30ff58 JB |
9196 | { |
9197 | pdi = pdi->die_child; | |
9198 | while (pdi != NULL) | |
9199 | { | |
52356b79 | 9200 | pdi->fixup (cu); |
bc30ff58 | 9201 | if (pdi->tag == DW_TAG_subprogram |
b1dc1806 | 9202 | || pdi->tag == DW_TAG_inlined_subroutine |
bc30ff58 | 9203 | || pdi->tag == DW_TAG_lexical_block) |
cdc07690 | 9204 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
bc30ff58 JB |
9205 | pdi = pdi->die_sibling; |
9206 | } | |
9207 | } | |
9208 | } | |
9209 | ||
91c24f0a DC |
9210 | /* Read a partial die corresponding to an enumeration type. */ |
9211 | ||
72bf9492 DJ |
9212 | static void |
9213 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
9214 | struct dwarf2_cu *cu) | |
91c24f0a | 9215 | { |
72bf9492 | 9216 | struct partial_die_info *pdi; |
91c24f0a DC |
9217 | |
9218 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
9219 | add_partial_symbol (enum_pdi, cu); |
9220 | ||
9221 | pdi = enum_pdi->die_child; | |
9222 | while (pdi) | |
91c24f0a | 9223 | { |
72bf9492 | 9224 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
b98664d3 | 9225 | complaint (_("malformed enumerator DIE ignored")); |
91c24f0a | 9226 | else |
72bf9492 DJ |
9227 | add_partial_symbol (pdi, cu); |
9228 | pdi = pdi->die_sibling; | |
91c24f0a | 9229 | } |
91c24f0a DC |
9230 | } |
9231 | ||
6caca83c CC |
9232 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
9233 | ||
9234 | static unsigned int | |
d521ce57 | 9235 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
9236 | { |
9237 | unsigned int bytes_read; | |
9238 | ||
9239 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
9240 | } | |
9241 | ||
685af9cd TT |
9242 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit |
9243 | READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation. | |
9244 | ||
4bb7a0a7 DJ |
9245 | Return the corresponding abbrev, or NULL if the number is zero (indicating |
9246 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
9247 | the initial number. */ | |
9248 | ||
9249 | static struct abbrev_info * | |
685af9cd TT |
9250 | peek_die_abbrev (const die_reader_specs &reader, |
9251 | const gdb_byte *info_ptr, unsigned int *bytes_read) | |
4bb7a0a7 | 9252 | { |
685af9cd | 9253 | dwarf2_cu *cu = reader.cu; |
518817b3 | 9254 | bfd *abfd = cu->per_cu->dwarf2_per_objfile->objfile->obfd; |
685af9cd TT |
9255 | unsigned int abbrev_number |
9256 | = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
4bb7a0a7 DJ |
9257 | |
9258 | if (abbrev_number == 0) | |
9259 | return NULL; | |
9260 | ||
685af9cd | 9261 | abbrev_info *abbrev = reader.abbrev_table->lookup_abbrev (abbrev_number); |
4bb7a0a7 DJ |
9262 | if (!abbrev) |
9263 | { | |
422b9917 | 9264 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
9d8780f0 | 9265 | " at offset %s [in module %s]"), |
422b9917 | 9266 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", |
9d8780f0 | 9267 | sect_offset_str (cu->header.sect_off), bfd_get_filename (abfd)); |
4bb7a0a7 DJ |
9268 | } |
9269 | ||
9270 | return abbrev; | |
9271 | } | |
9272 | ||
93311388 DE |
9273 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
9274 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
9275 | DIE. Any children of the skipped DIEs will also be skipped. */ |
9276 | ||
d521ce57 TT |
9277 | static const gdb_byte * |
9278 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 9279 | { |
4bb7a0a7 DJ |
9280 | while (1) |
9281 | { | |
685af9cd TT |
9282 | unsigned int bytes_read; |
9283 | abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, &bytes_read); | |
9284 | ||
4bb7a0a7 DJ |
9285 | if (abbrev == NULL) |
9286 | return info_ptr + bytes_read; | |
9287 | else | |
dee91e82 | 9288 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
9289 | } |
9290 | } | |
9291 | ||
93311388 DE |
9292 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
9293 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
9294 | abbrev corresponding to that skipped uleb128 should be passed in |
9295 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
9296 | children. */ | |
9297 | ||
d521ce57 TT |
9298 | static const gdb_byte * |
9299 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 9300 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
9301 | { |
9302 | unsigned int bytes_read; | |
9303 | struct attribute attr; | |
dee91e82 DE |
9304 | bfd *abfd = reader->abfd; |
9305 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 9306 | const gdb_byte *buffer = reader->buffer; |
f664829e | 9307 | const gdb_byte *buffer_end = reader->buffer_end; |
4bb7a0a7 DJ |
9308 | unsigned int form, i; |
9309 | ||
9310 | for (i = 0; i < abbrev->num_attrs; i++) | |
9311 | { | |
9312 | /* The only abbrev we care about is DW_AT_sibling. */ | |
9313 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
9314 | { | |
dee91e82 | 9315 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 9316 | if (attr.form == DW_FORM_ref_addr) |
b98664d3 | 9317 | complaint (_("ignoring absolute DW_AT_sibling")); |
4bb7a0a7 | 9318 | else |
b9502d3f | 9319 | { |
9c541725 PA |
9320 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
9321 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
9322 | |
9323 | if (sibling_ptr < info_ptr) | |
b98664d3 | 9324 | complaint (_("DW_AT_sibling points backwards")); |
22869d73 KS |
9325 | else if (sibling_ptr > reader->buffer_end) |
9326 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
9327 | else |
9328 | return sibling_ptr; | |
9329 | } | |
4bb7a0a7 DJ |
9330 | } |
9331 | ||
9332 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
9333 | form = abbrev->attrs[i].form; | |
9334 | skip_attribute: | |
9335 | switch (form) | |
9336 | { | |
4bb7a0a7 | 9337 | case DW_FORM_ref_addr: |
ae411497 TT |
9338 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
9339 | and later it is offset sized. */ | |
9340 | if (cu->header.version == 2) | |
9341 | info_ptr += cu->header.addr_size; | |
9342 | else | |
9343 | info_ptr += cu->header.offset_size; | |
9344 | break; | |
36586728 TT |
9345 | case DW_FORM_GNU_ref_alt: |
9346 | info_ptr += cu->header.offset_size; | |
9347 | break; | |
ae411497 | 9348 | case DW_FORM_addr: |
4bb7a0a7 DJ |
9349 | info_ptr += cu->header.addr_size; |
9350 | break; | |
9351 | case DW_FORM_data1: | |
9352 | case DW_FORM_ref1: | |
9353 | case DW_FORM_flag: | |
8fe0f950 | 9354 | case DW_FORM_strx1: |
4bb7a0a7 DJ |
9355 | info_ptr += 1; |
9356 | break; | |
2dc7f7b3 | 9357 | case DW_FORM_flag_present: |
43988095 | 9358 | case DW_FORM_implicit_const: |
2dc7f7b3 | 9359 | break; |
4bb7a0a7 DJ |
9360 | case DW_FORM_data2: |
9361 | case DW_FORM_ref2: | |
8fe0f950 | 9362 | case DW_FORM_strx2: |
4bb7a0a7 DJ |
9363 | info_ptr += 2; |
9364 | break; | |
8fe0f950 AT |
9365 | case DW_FORM_strx3: |
9366 | info_ptr += 3; | |
9367 | break; | |
4bb7a0a7 DJ |
9368 | case DW_FORM_data4: |
9369 | case DW_FORM_ref4: | |
8fe0f950 | 9370 | case DW_FORM_strx4: |
4bb7a0a7 DJ |
9371 | info_ptr += 4; |
9372 | break; | |
9373 | case DW_FORM_data8: | |
9374 | case DW_FORM_ref8: | |
55f1336d | 9375 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
9376 | info_ptr += 8; |
9377 | break; | |
0224619f JK |
9378 | case DW_FORM_data16: |
9379 | info_ptr += 16; | |
9380 | break; | |
4bb7a0a7 | 9381 | case DW_FORM_string: |
9b1c24c8 | 9382 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
9383 | info_ptr += bytes_read; |
9384 | break; | |
2dc7f7b3 | 9385 | case DW_FORM_sec_offset: |
4bb7a0a7 | 9386 | case DW_FORM_strp: |
36586728 | 9387 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
9388 | info_ptr += cu->header.offset_size; |
9389 | break; | |
2dc7f7b3 | 9390 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
9391 | case DW_FORM_block: |
9392 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
9393 | info_ptr += bytes_read; | |
9394 | break; | |
9395 | case DW_FORM_block1: | |
9396 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
9397 | break; | |
9398 | case DW_FORM_block2: | |
9399 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
9400 | break; | |
9401 | case DW_FORM_block4: | |
9402 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
9403 | break; | |
336d760d | 9404 | case DW_FORM_addrx: |
cf532bd1 | 9405 | case DW_FORM_strx: |
4bb7a0a7 DJ |
9406 | case DW_FORM_sdata: |
9407 | case DW_FORM_udata: | |
9408 | case DW_FORM_ref_udata: | |
3019eac3 DE |
9409 | case DW_FORM_GNU_addr_index: |
9410 | case DW_FORM_GNU_str_index: | |
d521ce57 | 9411 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
9412 | break; |
9413 | case DW_FORM_indirect: | |
9414 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
9415 | info_ptr += bytes_read; | |
9416 | /* We need to continue parsing from here, so just go back to | |
9417 | the top. */ | |
9418 | goto skip_attribute; | |
9419 | ||
9420 | default: | |
3e43a32a MS |
9421 | error (_("Dwarf Error: Cannot handle %s " |
9422 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
9423 | dwarf_form_name (form), |
9424 | bfd_get_filename (abfd)); | |
9425 | } | |
9426 | } | |
9427 | ||
9428 | if (abbrev->has_children) | |
dee91e82 | 9429 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
9430 | else |
9431 | return info_ptr; | |
9432 | } | |
9433 | ||
93311388 | 9434 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 9435 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 9436 | |
d521ce57 | 9437 | static const gdb_byte * |
dee91e82 DE |
9438 | locate_pdi_sibling (const struct die_reader_specs *reader, |
9439 | struct partial_die_info *orig_pdi, | |
d521ce57 | 9440 | const gdb_byte *info_ptr) |
91c24f0a DC |
9441 | { |
9442 | /* Do we know the sibling already? */ | |
72bf9492 | 9443 | |
91c24f0a DC |
9444 | if (orig_pdi->sibling) |
9445 | return orig_pdi->sibling; | |
9446 | ||
9447 | /* Are there any children to deal with? */ | |
9448 | ||
9449 | if (!orig_pdi->has_children) | |
9450 | return info_ptr; | |
9451 | ||
4bb7a0a7 | 9452 | /* Skip the children the long way. */ |
91c24f0a | 9453 | |
dee91e82 | 9454 | return skip_children (reader, info_ptr); |
91c24f0a DC |
9455 | } |
9456 | ||
257e7a09 | 9457 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 9458 | not NULL. */ |
c906108c SS |
9459 | |
9460 | static void | |
257e7a09 YQ |
9461 | dwarf2_read_symtab (struct partial_symtab *self, |
9462 | struct objfile *objfile) | |
c906108c | 9463 | { |
ed2dc618 SM |
9464 | struct dwarf2_per_objfile *dwarf2_per_objfile |
9465 | = get_dwarf2_per_objfile (objfile); | |
9466 | ||
257e7a09 | 9467 | if (self->readin) |
c906108c | 9468 | { |
442e4d9c | 9469 | warning (_("bug: psymtab for %s is already read in."), |
257e7a09 | 9470 | self->filename); |
442e4d9c YQ |
9471 | } |
9472 | else | |
9473 | { | |
9474 | if (info_verbose) | |
c906108c | 9475 | { |
442e4d9c | 9476 | printf_filtered (_("Reading in symbols for %s..."), |
257e7a09 | 9477 | self->filename); |
442e4d9c | 9478 | gdb_flush (gdb_stdout); |
c906108c | 9479 | } |
c906108c | 9480 | |
442e4d9c YQ |
9481 | /* If this psymtab is constructed from a debug-only objfile, the |
9482 | has_section_at_zero flag will not necessarily be correct. We | |
9483 | can get the correct value for this flag by looking at the data | |
9484 | associated with the (presumably stripped) associated objfile. */ | |
9485 | if (objfile->separate_debug_objfile_backlink) | |
9486 | { | |
9487 | struct dwarf2_per_objfile *dpo_backlink | |
ed2dc618 | 9488 | = get_dwarf2_per_objfile (objfile->separate_debug_objfile_backlink); |
9a619af0 | 9489 | |
442e4d9c YQ |
9490 | dwarf2_per_objfile->has_section_at_zero |
9491 | = dpo_backlink->has_section_at_zero; | |
9492 | } | |
b2ab525c | 9493 | |
442e4d9c | 9494 | dwarf2_per_objfile->reading_partial_symbols = 0; |
98bfdba5 | 9495 | |
257e7a09 | 9496 | psymtab_to_symtab_1 (self); |
c906108c | 9497 | |
442e4d9c YQ |
9498 | /* Finish up the debug error message. */ |
9499 | if (info_verbose) | |
9500 | printf_filtered (_("done.\n")); | |
c906108c | 9501 | } |
95554aad | 9502 | |
ed2dc618 | 9503 | process_cu_includes (dwarf2_per_objfile); |
c906108c | 9504 | } |
9cdd5dbd DE |
9505 | \f |
9506 | /* Reading in full CUs. */ | |
c906108c | 9507 | |
10b3939b DJ |
9508 | /* Add PER_CU to the queue. */ |
9509 | ||
9510 | static void | |
95554aad TT |
9511 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
9512 | enum language pretend_language) | |
10b3939b DJ |
9513 | { |
9514 | struct dwarf2_queue_item *item; | |
9515 | ||
9516 | per_cu->queued = 1; | |
8d749320 | 9517 | item = XNEW (struct dwarf2_queue_item); |
10b3939b | 9518 | item->per_cu = per_cu; |
95554aad | 9519 | item->pretend_language = pretend_language; |
10b3939b DJ |
9520 | item->next = NULL; |
9521 | ||
9522 | if (dwarf2_queue == NULL) | |
9523 | dwarf2_queue = item; | |
9524 | else | |
9525 | dwarf2_queue_tail->next = item; | |
9526 | ||
9527 | dwarf2_queue_tail = item; | |
9528 | } | |
9529 | ||
89e63ee4 DE |
9530 | /* If PER_CU is not yet queued, add it to the queue. |
9531 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
9532 | dependency. | |
0907af0c | 9533 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
9534 | meaning either PER_CU is already queued or it is already loaded. |
9535 | ||
9536 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
9537 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
9538 | |
9539 | static int | |
89e63ee4 | 9540 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
9541 | struct dwarf2_per_cu_data *per_cu, |
9542 | enum language pretend_language) | |
9543 | { | |
9544 | /* We may arrive here during partial symbol reading, if we need full | |
9545 | DIEs to process an unusual case (e.g. template arguments). Do | |
9546 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
ed2dc618 | 9547 | if (per_cu->dwarf2_per_objfile->reading_partial_symbols) |
0907af0c DE |
9548 | { |
9549 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
9550 | return 1; | |
9551 | return 0; | |
9552 | } | |
9553 | ||
9554 | /* Mark the dependence relation so that we don't flush PER_CU | |
9555 | too early. */ | |
89e63ee4 DE |
9556 | if (dependent_cu != NULL) |
9557 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
9558 | |
9559 | /* If it's already on the queue, we have nothing to do. */ | |
9560 | if (per_cu->queued) | |
9561 | return 0; | |
9562 | ||
9563 | /* If the compilation unit is already loaded, just mark it as | |
9564 | used. */ | |
9565 | if (per_cu->cu != NULL) | |
9566 | { | |
9567 | per_cu->cu->last_used = 0; | |
9568 | return 0; | |
9569 | } | |
9570 | ||
9571 | /* Add it to the queue. */ | |
9572 | queue_comp_unit (per_cu, pretend_language); | |
9573 | ||
9574 | return 1; | |
9575 | } | |
9576 | ||
10b3939b DJ |
9577 | /* Process the queue. */ |
9578 | ||
9579 | static void | |
ed2dc618 | 9580 | process_queue (struct dwarf2_per_objfile *dwarf2_per_objfile) |
10b3939b DJ |
9581 | { |
9582 | struct dwarf2_queue_item *item, *next_item; | |
9583 | ||
b4f54984 | 9584 | if (dwarf_read_debug) |
45cfd468 DE |
9585 | { |
9586 | fprintf_unfiltered (gdb_stdlog, | |
9587 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 9588 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
9589 | } |
9590 | ||
03dd20cc DJ |
9591 | /* The queue starts out with one item, but following a DIE reference |
9592 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
9593 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
9594 | { | |
cc12ce38 DE |
9595 | if ((dwarf2_per_objfile->using_index |
9596 | ? !item->per_cu->v.quick->compunit_symtab | |
9597 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
9598 | /* Skip dummy CUs. */ | |
9599 | && item->per_cu->cu != NULL) | |
f4dc4d17 DE |
9600 | { |
9601 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
73be47f5 | 9602 | unsigned int debug_print_threshold; |
247f5c4f | 9603 | char buf[100]; |
f4dc4d17 | 9604 | |
247f5c4f | 9605 | if (per_cu->is_debug_types) |
f4dc4d17 | 9606 | { |
247f5c4f DE |
9607 | struct signatured_type *sig_type = |
9608 | (struct signatured_type *) per_cu; | |
9609 | ||
9d8780f0 | 9610 | sprintf (buf, "TU %s at offset %s", |
73be47f5 | 9611 | hex_string (sig_type->signature), |
9d8780f0 | 9612 | sect_offset_str (per_cu->sect_off)); |
73be47f5 DE |
9613 | /* There can be 100s of TUs. |
9614 | Only print them in verbose mode. */ | |
9615 | debug_print_threshold = 2; | |
f4dc4d17 | 9616 | } |
247f5c4f | 9617 | else |
73be47f5 | 9618 | { |
9d8780f0 SM |
9619 | sprintf (buf, "CU at offset %s", |
9620 | sect_offset_str (per_cu->sect_off)); | |
73be47f5 DE |
9621 | debug_print_threshold = 1; |
9622 | } | |
247f5c4f | 9623 | |
b4f54984 | 9624 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 9625 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
f4dc4d17 DE |
9626 | |
9627 | if (per_cu->is_debug_types) | |
9628 | process_full_type_unit (per_cu, item->pretend_language); | |
9629 | else | |
9630 | process_full_comp_unit (per_cu, item->pretend_language); | |
9631 | ||
b4f54984 | 9632 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 9633 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 9634 | } |
10b3939b DJ |
9635 | |
9636 | item->per_cu->queued = 0; | |
9637 | next_item = item->next; | |
9638 | xfree (item); | |
9639 | } | |
9640 | ||
9641 | dwarf2_queue_tail = NULL; | |
45cfd468 | 9642 | |
b4f54984 | 9643 | if (dwarf_read_debug) |
45cfd468 DE |
9644 | { |
9645 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 9646 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 9647 | } |
10b3939b DJ |
9648 | } |
9649 | ||
10b3939b DJ |
9650 | /* Read in full symbols for PST, and anything it depends on. */ |
9651 | ||
c906108c | 9652 | static void |
fba45db2 | 9653 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 9654 | { |
10b3939b | 9655 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
9656 | int i; |
9657 | ||
95554aad TT |
9658 | if (pst->readin) |
9659 | return; | |
9660 | ||
aaa75496 | 9661 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
9662 | if (!pst->dependencies[i]->readin |
9663 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
9664 | { |
9665 | /* Inform about additional files that need to be read in. */ | |
9666 | if (info_verbose) | |
9667 | { | |
a3f17187 | 9668 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
9669 | fputs_filtered (" ", gdb_stdout); |
9670 | wrap_here (""); | |
9671 | fputs_filtered ("and ", gdb_stdout); | |
9672 | wrap_here (""); | |
9673 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 9674 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
9675 | gdb_flush (gdb_stdout); |
9676 | } | |
9677 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
9678 | } | |
9679 | ||
9a3c8263 | 9680 | per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private; |
10b3939b DJ |
9681 | |
9682 | if (per_cu == NULL) | |
aaa75496 JB |
9683 | { |
9684 | /* It's an include file, no symbols to read for it. | |
9685 | Everything is in the parent symtab. */ | |
9686 | pst->readin = 1; | |
9687 | return; | |
9688 | } | |
c906108c | 9689 | |
58f0c718 | 9690 | dw2_do_instantiate_symtab (per_cu, false); |
10b3939b DJ |
9691 | } |
9692 | ||
dee91e82 DE |
9693 | /* Trivial hash function for die_info: the hash value of a DIE |
9694 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 9695 | |
dee91e82 DE |
9696 | static hashval_t |
9697 | die_hash (const void *item) | |
10b3939b | 9698 | { |
9a3c8263 | 9699 | const struct die_info *die = (const struct die_info *) item; |
6502dd73 | 9700 | |
9c541725 | 9701 | return to_underlying (die->sect_off); |
dee91e82 | 9702 | } |
63d06c5c | 9703 | |
dee91e82 DE |
9704 | /* Trivial comparison function for die_info structures: two DIEs |
9705 | are equal if they have the same offset. */ | |
98bfdba5 | 9706 | |
dee91e82 DE |
9707 | static int |
9708 | die_eq (const void *item_lhs, const void *item_rhs) | |
9709 | { | |
9a3c8263 SM |
9710 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
9711 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; | |
c906108c | 9712 | |
9c541725 | 9713 | return die_lhs->sect_off == die_rhs->sect_off; |
dee91e82 | 9714 | } |
c906108c | 9715 | |
dee91e82 DE |
9716 | /* die_reader_func for load_full_comp_unit. |
9717 | This is identical to read_signatured_type_reader, | |
9718 | but is kept separate for now. */ | |
c906108c | 9719 | |
dee91e82 DE |
9720 | static void |
9721 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 9722 | const gdb_byte *info_ptr, |
dee91e82 DE |
9723 | struct die_info *comp_unit_die, |
9724 | int has_children, | |
9725 | void *data) | |
9726 | { | |
9727 | struct dwarf2_cu *cu = reader->cu; | |
9a3c8263 | 9728 | enum language *language_ptr = (enum language *) data; |
6caca83c | 9729 | |
dee91e82 DE |
9730 | gdb_assert (cu->die_hash == NULL); |
9731 | cu->die_hash = | |
9732 | htab_create_alloc_ex (cu->header.length / 12, | |
9733 | die_hash, | |
9734 | die_eq, | |
9735 | NULL, | |
9736 | &cu->comp_unit_obstack, | |
9737 | hashtab_obstack_allocate, | |
9738 | dummy_obstack_deallocate); | |
e142c38c | 9739 | |
dee91e82 DE |
9740 | if (has_children) |
9741 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
9742 | &info_ptr, comp_unit_die); | |
9743 | cu->dies = comp_unit_die; | |
9744 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
9745 | |
9746 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 9747 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 9748 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
9749 | or we won't be able to build types correctly. |
9750 | Similarly, if we do not read the producer, we can not apply | |
9751 | producer-specific interpretation. */ | |
95554aad | 9752 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 9753 | } |
10b3939b | 9754 | |
dee91e82 | 9755 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 9756 | |
dee91e82 | 9757 | static void |
95554aad | 9758 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
58f0c718 | 9759 | bool skip_partial, |
95554aad | 9760 | enum language pretend_language) |
dee91e82 | 9761 | { |
3019eac3 | 9762 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 9763 | |
58f0c718 | 9764 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, skip_partial, |
f4dc4d17 | 9765 | load_full_comp_unit_reader, &pretend_language); |
10b3939b DJ |
9766 | } |
9767 | ||
3da10d80 KS |
9768 | /* Add a DIE to the delayed physname list. */ |
9769 | ||
9770 | static void | |
9771 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
9772 | const char *name, struct die_info *die, | |
9773 | struct dwarf2_cu *cu) | |
9774 | { | |
9775 | struct delayed_method_info mi; | |
9776 | mi.type = type; | |
9777 | mi.fnfield_index = fnfield_index; | |
9778 | mi.index = index; | |
9779 | mi.name = name; | |
9780 | mi.die = die; | |
c89b44cd | 9781 | cu->method_list.push_back (mi); |
3da10d80 KS |
9782 | } |
9783 | ||
3693fdb3 PA |
9784 | /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like |
9785 | "const" / "volatile". If so, decrements LEN by the length of the | |
9786 | modifier and return true. Otherwise return false. */ | |
9787 | ||
9788 | template<size_t N> | |
9789 | static bool | |
9790 | check_modifier (const char *physname, size_t &len, const char (&mod)[N]) | |
9791 | { | |
9792 | size_t mod_len = sizeof (mod) - 1; | |
9793 | if (len > mod_len && startswith (physname + (len - mod_len), mod)) | |
9794 | { | |
9795 | len -= mod_len; | |
9796 | return true; | |
9797 | } | |
9798 | return false; | |
9799 | } | |
9800 | ||
3da10d80 KS |
9801 | /* Compute the physnames of any methods on the CU's method list. |
9802 | ||
9803 | The computation of method physnames is delayed in order to avoid the | |
9804 | (bad) condition that one of the method's formal parameters is of an as yet | |
9805 | incomplete type. */ | |
9806 | ||
9807 | static void | |
9808 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
9809 | { | |
3693fdb3 | 9810 | /* Only C++ delays computing physnames. */ |
c89b44cd | 9811 | if (cu->method_list.empty ()) |
3693fdb3 PA |
9812 | return; |
9813 | gdb_assert (cu->language == language_cplus); | |
9814 | ||
52941706 | 9815 | for (const delayed_method_info &mi : cu->method_list) |
3da10d80 | 9816 | { |
1d06ead6 | 9817 | const char *physname; |
3da10d80 | 9818 | struct fn_fieldlist *fn_flp |
c89b44cd TT |
9819 | = &TYPE_FN_FIELDLIST (mi.type, mi.fnfield_index); |
9820 | physname = dwarf2_physname (mi.name, mi.die, cu); | |
9821 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi.index) | |
005e54bb | 9822 | = physname ? physname : ""; |
3693fdb3 PA |
9823 | |
9824 | /* Since there's no tag to indicate whether a method is a | |
9825 | const/volatile overload, extract that information out of the | |
9826 | demangled name. */ | |
9827 | if (physname != NULL) | |
9828 | { | |
9829 | size_t len = strlen (physname); | |
9830 | ||
9831 | while (1) | |
9832 | { | |
9833 | if (physname[len] == ')') /* shortcut */ | |
9834 | break; | |
9835 | else if (check_modifier (physname, len, " const")) | |
c89b44cd | 9836 | TYPE_FN_FIELD_CONST (fn_flp->fn_fields, mi.index) = 1; |
3693fdb3 | 9837 | else if (check_modifier (physname, len, " volatile")) |
c89b44cd | 9838 | TYPE_FN_FIELD_VOLATILE (fn_flp->fn_fields, mi.index) = 1; |
3693fdb3 PA |
9839 | else |
9840 | break; | |
9841 | } | |
9842 | } | |
3da10d80 | 9843 | } |
c89b44cd TT |
9844 | |
9845 | /* The list is no longer needed. */ | |
9846 | cu->method_list.clear (); | |
3da10d80 KS |
9847 | } |
9848 | ||
a766d390 DE |
9849 | /* Go objects should be embedded in a DW_TAG_module DIE, |
9850 | and it's not clear if/how imported objects will appear. | |
9851 | To keep Go support simple until that's worked out, | |
9852 | go back through what we've read and create something usable. | |
9853 | We could do this while processing each DIE, and feels kinda cleaner, | |
9854 | but that way is more invasive. | |
9855 | This is to, for example, allow the user to type "p var" or "b main" | |
9856 | without having to specify the package name, and allow lookups | |
9857 | of module.object to work in contexts that use the expression | |
9858 | parser. */ | |
9859 | ||
9860 | static void | |
9861 | fixup_go_packaging (struct dwarf2_cu *cu) | |
9862 | { | |
9863 | char *package_name = NULL; | |
9864 | struct pending *list; | |
9865 | int i; | |
9866 | ||
c24bdb02 | 9867 | for (list = *cu->get_builder ()->get_global_symbols (); |
804d2729 TT |
9868 | list != NULL; |
9869 | list = list->next) | |
a766d390 DE |
9870 | { |
9871 | for (i = 0; i < list->nsyms; ++i) | |
9872 | { | |
9873 | struct symbol *sym = list->symbol[i]; | |
9874 | ||
9875 | if (SYMBOL_LANGUAGE (sym) == language_go | |
9876 | && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
9877 | { | |
9878 | char *this_package_name = go_symbol_package_name (sym); | |
9879 | ||
9880 | if (this_package_name == NULL) | |
9881 | continue; | |
9882 | if (package_name == NULL) | |
9883 | package_name = this_package_name; | |
9884 | else | |
9885 | { | |
518817b3 SM |
9886 | struct objfile *objfile |
9887 | = cu->per_cu->dwarf2_per_objfile->objfile; | |
a766d390 | 9888 | if (strcmp (package_name, this_package_name) != 0) |
b98664d3 | 9889 | complaint (_("Symtab %s has objects from two different Go packages: %s and %s"), |
08be3fe3 DE |
9890 | (symbol_symtab (sym) != NULL |
9891 | ? symtab_to_filename_for_display | |
9892 | (symbol_symtab (sym)) | |
e3b94546 | 9893 | : objfile_name (objfile)), |
a766d390 DE |
9894 | this_package_name, package_name); |
9895 | xfree (this_package_name); | |
9896 | } | |
9897 | } | |
9898 | } | |
9899 | } | |
9900 | ||
9901 | if (package_name != NULL) | |
9902 | { | |
518817b3 | 9903 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
34a68019 | 9904 | const char *saved_package_name |
021887d8 | 9905 | = obstack_strdup (&objfile->per_bfd->storage_obstack, package_name); |
19f392bc UW |
9906 | struct type *type = init_type (objfile, TYPE_CODE_MODULE, 0, |
9907 | saved_package_name); | |
a766d390 DE |
9908 | struct symbol *sym; |
9909 | ||
e623cf5d | 9910 | sym = allocate_symbol (objfile); |
f85f34ed | 9911 | SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack); |
86f62fd7 TT |
9912 | SYMBOL_SET_NAMES (sym, saved_package_name, |
9913 | strlen (saved_package_name), 0, objfile); | |
a766d390 DE |
9914 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
9915 | e.g., "main" finds the "main" module and not C's main(). */ | |
9916 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 9917 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
9918 | SYMBOL_TYPE (sym) = type; |
9919 | ||
c24bdb02 | 9920 | add_symbol_to_list (sym, cu->get_builder ()->get_global_symbols ()); |
a766d390 DE |
9921 | |
9922 | xfree (package_name); | |
9923 | } | |
9924 | } | |
9925 | ||
c9317f21 TT |
9926 | /* Allocate a fully-qualified name consisting of the two parts on the |
9927 | obstack. */ | |
9928 | ||
9929 | static const char * | |
9930 | rust_fully_qualify (struct obstack *obstack, const char *p1, const char *p2) | |
9931 | { | |
9932 | return obconcat (obstack, p1, "::", p2, (char *) NULL); | |
9933 | } | |
9934 | ||
9935 | /* A helper that allocates a struct discriminant_info to attach to a | |
9936 | union type. */ | |
9937 | ||
9938 | static struct discriminant_info * | |
9939 | alloc_discriminant_info (struct type *type, int discriminant_index, | |
9940 | int default_index) | |
9941 | { | |
9942 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_UNION); | |
c7b15a66 TT |
9943 | gdb_assert (discriminant_index == -1 |
9944 | || (discriminant_index >= 0 | |
9945 | && discriminant_index < TYPE_NFIELDS (type))); | |
c9317f21 | 9946 | gdb_assert (default_index == -1 |
c7b15a66 | 9947 | || (default_index >= 0 && default_index < TYPE_NFIELDS (type))); |
c9317f21 TT |
9948 | |
9949 | TYPE_FLAG_DISCRIMINATED_UNION (type) = 1; | |
9950 | ||
9951 | struct discriminant_info *disc | |
9952 | = ((struct discriminant_info *) | |
9953 | TYPE_ZALLOC (type, | |
9954 | offsetof (struct discriminant_info, discriminants) | |
9955 | + TYPE_NFIELDS (type) * sizeof (disc->discriminants[0]))); | |
9956 | disc->default_index = default_index; | |
9957 | disc->discriminant_index = discriminant_index; | |
9958 | ||
9959 | struct dynamic_prop prop; | |
9960 | prop.kind = PROP_UNDEFINED; | |
9961 | prop.data.baton = disc; | |
9962 | ||
9963 | add_dyn_prop (DYN_PROP_DISCRIMINATED, prop, type); | |
9964 | ||
9965 | return disc; | |
9966 | } | |
9967 | ||
9968 | /* Some versions of rustc emitted enums in an unusual way. | |
9969 | ||
9970 | Ordinary enums were emitted as unions. The first element of each | |
9971 | structure in the union was named "RUST$ENUM$DISR". This element | |
9972 | held the discriminant. | |
9973 | ||
9974 | These versions of Rust also implemented the "non-zero" | |
9975 | optimization. When the enum had two values, and one is empty and | |
9976 | the other holds a pointer that cannot be zero, the pointer is used | |
9977 | as the discriminant, with a zero value meaning the empty variant. | |
9978 | Here, the union's first member is of the form | |
9979 | RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname> | |
9980 | where the fieldnos are the indices of the fields that should be | |
9981 | traversed in order to find the field (which may be several fields deep) | |
9982 | and the variantname is the name of the variant of the case when the | |
9983 | field is zero. | |
9984 | ||
9985 | This function recognizes whether TYPE is of one of these forms, | |
9986 | and, if so, smashes it to be a variant type. */ | |
9987 | ||
9988 | static void | |
9989 | quirk_rust_enum (struct type *type, struct objfile *objfile) | |
9990 | { | |
9991 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_UNION); | |
9992 | ||
9993 | /* We don't need to deal with empty enums. */ | |
9994 | if (TYPE_NFIELDS (type) == 0) | |
9995 | return; | |
9996 | ||
9997 | #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$" | |
9998 | if (TYPE_NFIELDS (type) == 1 | |
9999 | && startswith (TYPE_FIELD_NAME (type, 0), RUST_ENUM_PREFIX)) | |
10000 | { | |
10001 | const char *name = TYPE_FIELD_NAME (type, 0) + strlen (RUST_ENUM_PREFIX); | |
10002 | ||
10003 | /* Decode the field name to find the offset of the | |
10004 | discriminant. */ | |
10005 | ULONGEST bit_offset = 0; | |
10006 | struct type *field_type = TYPE_FIELD_TYPE (type, 0); | |
10007 | while (name[0] >= '0' && name[0] <= '9') | |
10008 | { | |
10009 | char *tail; | |
10010 | unsigned long index = strtoul (name, &tail, 10); | |
10011 | name = tail; | |
10012 | if (*name != '$' | |
10013 | || index >= TYPE_NFIELDS (field_type) | |
10014 | || (TYPE_FIELD_LOC_KIND (field_type, index) | |
10015 | != FIELD_LOC_KIND_BITPOS)) | |
10016 | { | |
b98664d3 | 10017 | complaint (_("Could not parse Rust enum encoding string \"%s\"" |
c9317f21 TT |
10018 | "[in module %s]"), |
10019 | TYPE_FIELD_NAME (type, 0), | |
10020 | objfile_name (objfile)); | |
10021 | return; | |
10022 | } | |
10023 | ++name; | |
10024 | ||
10025 | bit_offset += TYPE_FIELD_BITPOS (field_type, index); | |
10026 | field_type = TYPE_FIELD_TYPE (field_type, index); | |
10027 | } | |
10028 | ||
10029 | /* Make a union to hold the variants. */ | |
10030 | struct type *union_type = alloc_type (objfile); | |
10031 | TYPE_CODE (union_type) = TYPE_CODE_UNION; | |
10032 | TYPE_NFIELDS (union_type) = 3; | |
10033 | TYPE_FIELDS (union_type) | |
10034 | = (struct field *) TYPE_ZALLOC (type, 3 * sizeof (struct field)); | |
10035 | TYPE_LENGTH (union_type) = TYPE_LENGTH (type); | |
2b4424c3 | 10036 | set_type_align (union_type, TYPE_RAW_ALIGN (type)); |
c9317f21 TT |
10037 | |
10038 | /* Put the discriminant must at index 0. */ | |
10039 | TYPE_FIELD_TYPE (union_type, 0) = field_type; | |
10040 | TYPE_FIELD_ARTIFICIAL (union_type, 0) = 1; | |
10041 | TYPE_FIELD_NAME (union_type, 0) = "<<discriminant>>"; | |
10042 | SET_FIELD_BITPOS (TYPE_FIELD (union_type, 0), bit_offset); | |
10043 | ||
10044 | /* The order of fields doesn't really matter, so put the real | |
10045 | field at index 1 and the data-less field at index 2. */ | |
10046 | struct discriminant_info *disc | |
10047 | = alloc_discriminant_info (union_type, 0, 1); | |
10048 | TYPE_FIELD (union_type, 1) = TYPE_FIELD (type, 0); | |
10049 | TYPE_FIELD_NAME (union_type, 1) | |
10050 | = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type, 1))); | |
10051 | TYPE_NAME (TYPE_FIELD_TYPE (union_type, 1)) | |
10052 | = rust_fully_qualify (&objfile->objfile_obstack, TYPE_NAME (type), | |
10053 | TYPE_FIELD_NAME (union_type, 1)); | |
10054 | ||
10055 | const char *dataless_name | |
10056 | = rust_fully_qualify (&objfile->objfile_obstack, TYPE_NAME (type), | |
10057 | name); | |
10058 | struct type *dataless_type = init_type (objfile, TYPE_CODE_VOID, 0, | |
10059 | dataless_name); | |
10060 | TYPE_FIELD_TYPE (union_type, 2) = dataless_type; | |
10061 | /* NAME points into the original discriminant name, which | |
10062 | already has the correct lifetime. */ | |
10063 | TYPE_FIELD_NAME (union_type, 2) = name; | |
10064 | SET_FIELD_BITPOS (TYPE_FIELD (union_type, 2), 0); | |
10065 | disc->discriminants[2] = 0; | |
10066 | ||
10067 | /* Smash this type to be a structure type. We have to do this | |
10068 | because the type has already been recorded. */ | |
10069 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
10070 | TYPE_NFIELDS (type) = 1; | |
10071 | TYPE_FIELDS (type) | |
10072 | = (struct field *) TYPE_ZALLOC (type, sizeof (struct field)); | |
10073 | ||
10074 | /* Install the variant part. */ | |
10075 | TYPE_FIELD_TYPE (type, 0) = union_type; | |
10076 | SET_FIELD_BITPOS (TYPE_FIELD (type, 0), 0); | |
10077 | TYPE_FIELD_NAME (type, 0) = "<<variants>>"; | |
10078 | } | |
10079 | else if (TYPE_NFIELDS (type) == 1) | |
10080 | { | |
10081 | /* We assume that a union with a single field is a univariant | |
10082 | enum. */ | |
10083 | /* Smash this type to be a structure type. We have to do this | |
10084 | because the type has already been recorded. */ | |
10085 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
10086 | ||
10087 | /* Make a union to hold the variants. */ | |
10088 | struct type *union_type = alloc_type (objfile); | |
10089 | TYPE_CODE (union_type) = TYPE_CODE_UNION; | |
10090 | TYPE_NFIELDS (union_type) = TYPE_NFIELDS (type); | |
10091 | TYPE_LENGTH (union_type) = TYPE_LENGTH (type); | |
2b4424c3 | 10092 | set_type_align (union_type, TYPE_RAW_ALIGN (type)); |
c9317f21 TT |
10093 | TYPE_FIELDS (union_type) = TYPE_FIELDS (type); |
10094 | ||
10095 | struct type *field_type = TYPE_FIELD_TYPE (union_type, 0); | |
10096 | const char *variant_name | |
10097 | = rust_last_path_segment (TYPE_NAME (field_type)); | |
10098 | TYPE_FIELD_NAME (union_type, 0) = variant_name; | |
10099 | TYPE_NAME (field_type) | |
10100 | = rust_fully_qualify (&objfile->objfile_obstack, | |
c7b15a66 | 10101 | TYPE_NAME (type), variant_name); |
c9317f21 TT |
10102 | |
10103 | /* Install the union in the outer struct type. */ | |
10104 | TYPE_NFIELDS (type) = 1; | |
10105 | TYPE_FIELDS (type) | |
10106 | = (struct field *) TYPE_ZALLOC (union_type, sizeof (struct field)); | |
10107 | TYPE_FIELD_TYPE (type, 0) = union_type; | |
10108 | TYPE_FIELD_NAME (type, 0) = "<<variants>>"; | |
10109 | SET_FIELD_BITPOS (TYPE_FIELD (type, 0), 0); | |
10110 | ||
10111 | alloc_discriminant_info (union_type, -1, 0); | |
10112 | } | |
10113 | else | |
10114 | { | |
10115 | struct type *disr_type = nullptr; | |
10116 | for (int i = 0; i < TYPE_NFIELDS (type); ++i) | |
10117 | { | |
10118 | disr_type = TYPE_FIELD_TYPE (type, i); | |
10119 | ||
a037790e TT |
10120 | if (TYPE_CODE (disr_type) != TYPE_CODE_STRUCT) |
10121 | { | |
10122 | /* All fields of a true enum will be structs. */ | |
10123 | return; | |
10124 | } | |
10125 | else if (TYPE_NFIELDS (disr_type) == 0) | |
c9317f21 TT |
10126 | { |
10127 | /* Could be data-less variant, so keep going. */ | |
a037790e | 10128 | disr_type = nullptr; |
c9317f21 TT |
10129 | } |
10130 | else if (strcmp (TYPE_FIELD_NAME (disr_type, 0), | |
10131 | "RUST$ENUM$DISR") != 0) | |
10132 | { | |
10133 | /* Not a Rust enum. */ | |
10134 | return; | |
10135 | } | |
10136 | else | |
10137 | { | |
10138 | /* Found one. */ | |
10139 | break; | |
10140 | } | |
10141 | } | |
10142 | ||
10143 | /* If we got here without a discriminant, then it's probably | |
10144 | just a union. */ | |
10145 | if (disr_type == nullptr) | |
10146 | return; | |
10147 | ||
10148 | /* Smash this type to be a structure type. We have to do this | |
10149 | because the type has already been recorded. */ | |
10150 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
10151 | ||
10152 | /* Make a union to hold the variants. */ | |
10153 | struct field *disr_field = &TYPE_FIELD (disr_type, 0); | |
10154 | struct type *union_type = alloc_type (objfile); | |
10155 | TYPE_CODE (union_type) = TYPE_CODE_UNION; | |
10156 | TYPE_NFIELDS (union_type) = 1 + TYPE_NFIELDS (type); | |
10157 | TYPE_LENGTH (union_type) = TYPE_LENGTH (type); | |
2b4424c3 | 10158 | set_type_align (union_type, TYPE_RAW_ALIGN (type)); |
c9317f21 TT |
10159 | TYPE_FIELDS (union_type) |
10160 | = (struct field *) TYPE_ZALLOC (union_type, | |
10161 | (TYPE_NFIELDS (union_type) | |
10162 | * sizeof (struct field))); | |
10163 | ||
10164 | memcpy (TYPE_FIELDS (union_type) + 1, TYPE_FIELDS (type), | |
10165 | TYPE_NFIELDS (type) * sizeof (struct field)); | |
10166 | ||
10167 | /* Install the discriminant at index 0 in the union. */ | |
10168 | TYPE_FIELD (union_type, 0) = *disr_field; | |
10169 | TYPE_FIELD_ARTIFICIAL (union_type, 0) = 1; | |
10170 | TYPE_FIELD_NAME (union_type, 0) = "<<discriminant>>"; | |
10171 | ||
10172 | /* Install the union in the outer struct type. */ | |
10173 | TYPE_FIELD_TYPE (type, 0) = union_type; | |
10174 | TYPE_FIELD_NAME (type, 0) = "<<variants>>"; | |
10175 | TYPE_NFIELDS (type) = 1; | |
10176 | ||
10177 | /* Set the size and offset of the union type. */ | |
10178 | SET_FIELD_BITPOS (TYPE_FIELD (type, 0), 0); | |
10179 | ||
10180 | /* We need a way to find the correct discriminant given a | |
10181 | variant name. For convenience we build a map here. */ | |
10182 | struct type *enum_type = FIELD_TYPE (*disr_field); | |
10183 | std::unordered_map<std::string, ULONGEST> discriminant_map; | |
10184 | for (int i = 0; i < TYPE_NFIELDS (enum_type); ++i) | |
10185 | { | |
10186 | if (TYPE_FIELD_LOC_KIND (enum_type, i) == FIELD_LOC_KIND_ENUMVAL) | |
10187 | { | |
10188 | const char *name | |
10189 | = rust_last_path_segment (TYPE_FIELD_NAME (enum_type, i)); | |
10190 | discriminant_map[name] = TYPE_FIELD_ENUMVAL (enum_type, i); | |
10191 | } | |
10192 | } | |
10193 | ||
10194 | int n_fields = TYPE_NFIELDS (union_type); | |
10195 | struct discriminant_info *disc | |
10196 | = alloc_discriminant_info (union_type, 0, -1); | |
10197 | /* Skip the discriminant here. */ | |
10198 | for (int i = 1; i < n_fields; ++i) | |
10199 | { | |
10200 | /* Find the final word in the name of this variant's type. | |
10201 | That name can be used to look up the correct | |
10202 | discriminant. */ | |
10203 | const char *variant_name | |
10204 | = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type, | |
10205 | i))); | |
10206 | ||
10207 | auto iter = discriminant_map.find (variant_name); | |
10208 | if (iter != discriminant_map.end ()) | |
10209 | disc->discriminants[i] = iter->second; | |
10210 | ||
bedda9ac | 10211 | /* Remove the discriminant field, if it exists. */ |
c9317f21 | 10212 | struct type *sub_type = TYPE_FIELD_TYPE (union_type, i); |
bedda9ac TT |
10213 | if (TYPE_NFIELDS (sub_type) > 0) |
10214 | { | |
10215 | --TYPE_NFIELDS (sub_type); | |
10216 | ++TYPE_FIELDS (sub_type); | |
10217 | } | |
c9317f21 TT |
10218 | TYPE_FIELD_NAME (union_type, i) = variant_name; |
10219 | TYPE_NAME (sub_type) | |
10220 | = rust_fully_qualify (&objfile->objfile_obstack, | |
10221 | TYPE_NAME (type), variant_name); | |
10222 | } | |
10223 | } | |
10224 | } | |
10225 | ||
10226 | /* Rewrite some Rust unions to be structures with variants parts. */ | |
10227 | ||
10228 | static void | |
10229 | rust_union_quirks (struct dwarf2_cu *cu) | |
10230 | { | |
10231 | gdb_assert (cu->language == language_rust); | |
52941706 SM |
10232 | for (type *type_ : cu->rust_unions) |
10233 | quirk_rust_enum (type_, cu->per_cu->dwarf2_per_objfile->objfile); | |
2d79090e TT |
10234 | /* We don't need this any more. */ |
10235 | cu->rust_unions.clear (); | |
c9317f21 TT |
10236 | } |
10237 | ||
95554aad TT |
10238 | /* Return the symtab for PER_CU. This works properly regardless of |
10239 | whether we're using the index or psymtabs. */ | |
10240 | ||
43f3e411 DE |
10241 | static struct compunit_symtab * |
10242 | get_compunit_symtab (struct dwarf2_per_cu_data *per_cu) | |
95554aad | 10243 | { |
ed2dc618 | 10244 | return (per_cu->dwarf2_per_objfile->using_index |
43f3e411 DE |
10245 | ? per_cu->v.quick->compunit_symtab |
10246 | : per_cu->v.psymtab->compunit_symtab); | |
95554aad TT |
10247 | } |
10248 | ||
10249 | /* A helper function for computing the list of all symbol tables | |
10250 | included by PER_CU. */ | |
10251 | ||
10252 | static void | |
4c39bc03 | 10253 | recursively_compute_inclusions (std::vector<compunit_symtab *> *result, |
ec94af83 | 10254 | htab_t all_children, htab_t all_type_symtabs, |
f9125b6c | 10255 | struct dwarf2_per_cu_data *per_cu, |
43f3e411 | 10256 | struct compunit_symtab *immediate_parent) |
95554aad TT |
10257 | { |
10258 | void **slot; | |
10259 | int ix; | |
43f3e411 | 10260 | struct compunit_symtab *cust; |
95554aad TT |
10261 | struct dwarf2_per_cu_data *iter; |
10262 | ||
10263 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
10264 | if (*slot != NULL) | |
10265 | { | |
10266 | /* This inclusion and its children have been processed. */ | |
10267 | return; | |
10268 | } | |
10269 | ||
10270 | *slot = per_cu; | |
10271 | /* Only add a CU if it has a symbol table. */ | |
43f3e411 DE |
10272 | cust = get_compunit_symtab (per_cu); |
10273 | if (cust != NULL) | |
ec94af83 DE |
10274 | { |
10275 | /* If this is a type unit only add its symbol table if we haven't | |
10276 | seen it yet (type unit per_cu's can share symtabs). */ | |
10277 | if (per_cu->is_debug_types) | |
10278 | { | |
43f3e411 | 10279 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
ec94af83 DE |
10280 | if (*slot == NULL) |
10281 | { | |
43f3e411 | 10282 | *slot = cust; |
4c39bc03 | 10283 | result->push_back (cust); |
43f3e411 DE |
10284 | if (cust->user == NULL) |
10285 | cust->user = immediate_parent; | |
ec94af83 DE |
10286 | } |
10287 | } | |
10288 | else | |
f9125b6c | 10289 | { |
4c39bc03 | 10290 | result->push_back (cust); |
43f3e411 DE |
10291 | if (cust->user == NULL) |
10292 | cust->user = immediate_parent; | |
f9125b6c | 10293 | } |
ec94af83 | 10294 | } |
95554aad TT |
10295 | |
10296 | for (ix = 0; | |
796a7ff8 | 10297 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter); |
95554aad | 10298 | ++ix) |
ec94af83 DE |
10299 | { |
10300 | recursively_compute_inclusions (result, all_children, | |
43f3e411 | 10301 | all_type_symtabs, iter, cust); |
ec94af83 | 10302 | } |
95554aad TT |
10303 | } |
10304 | ||
43f3e411 | 10305 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
95554aad TT |
10306 | PER_CU. */ |
10307 | ||
10308 | static void | |
43f3e411 | 10309 | compute_compunit_symtab_includes (struct dwarf2_per_cu_data *per_cu) |
95554aad | 10310 | { |
f4dc4d17 DE |
10311 | gdb_assert (! per_cu->is_debug_types); |
10312 | ||
796a7ff8 | 10313 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs)) |
95554aad TT |
10314 | { |
10315 | int ix, len; | |
ec94af83 | 10316 | struct dwarf2_per_cu_data *per_cu_iter; |
4c39bc03 | 10317 | std::vector<compunit_symtab *> result_symtabs; |
ec94af83 | 10318 | htab_t all_children, all_type_symtabs; |
43f3e411 | 10319 | struct compunit_symtab *cust = get_compunit_symtab (per_cu); |
95554aad TT |
10320 | |
10321 | /* If we don't have a symtab, we can just skip this case. */ | |
43f3e411 | 10322 | if (cust == NULL) |
95554aad TT |
10323 | return; |
10324 | ||
10325 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
10326 | NULL, xcalloc, xfree); | |
ec94af83 DE |
10327 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
10328 | NULL, xcalloc, xfree); | |
95554aad TT |
10329 | |
10330 | for (ix = 0; | |
796a7ff8 | 10331 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, |
ec94af83 | 10332 | ix, per_cu_iter); |
95554aad | 10333 | ++ix) |
ec94af83 DE |
10334 | { |
10335 | recursively_compute_inclusions (&result_symtabs, all_children, | |
f9125b6c | 10336 | all_type_symtabs, per_cu_iter, |
43f3e411 | 10337 | cust); |
ec94af83 | 10338 | } |
95554aad | 10339 | |
ec94af83 | 10340 | /* Now we have a transitive closure of all the included symtabs. */ |
4c39bc03 | 10341 | len = result_symtabs.size (); |
43f3e411 | 10342 | cust->includes |
ed2dc618 | 10343 | = XOBNEWVEC (&per_cu->dwarf2_per_objfile->objfile->objfile_obstack, |
8d749320 | 10344 | struct compunit_symtab *, len + 1); |
4c39bc03 TT |
10345 | memcpy (cust->includes, result_symtabs.data (), |
10346 | len * sizeof (compunit_symtab *)); | |
43f3e411 | 10347 | cust->includes[len] = NULL; |
95554aad | 10348 | |
95554aad | 10349 | htab_delete (all_children); |
ec94af83 | 10350 | htab_delete (all_type_symtabs); |
95554aad TT |
10351 | } |
10352 | } | |
10353 | ||
10354 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
10355 | read. */ | |
10356 | ||
10357 | static void | |
ed2dc618 | 10358 | process_cu_includes (struct dwarf2_per_objfile *dwarf2_per_objfile) |
95554aad | 10359 | { |
71b73764 | 10360 | for (dwarf2_per_cu_data *iter : dwarf2_per_objfile->just_read_cus) |
f4dc4d17 DE |
10361 | { |
10362 | if (! iter->is_debug_types) | |
43f3e411 | 10363 | compute_compunit_symtab_includes (iter); |
f4dc4d17 | 10364 | } |
95554aad | 10365 | |
c5d0225d | 10366 | dwarf2_per_objfile->just_read_cus.clear (); |
95554aad TT |
10367 | } |
10368 | ||
9cdd5dbd | 10369 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
10370 | already been loaded into memory. */ |
10371 | ||
10372 | static void | |
95554aad TT |
10373 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
10374 | enum language pretend_language) | |
10b3939b | 10375 | { |
10b3939b | 10376 | struct dwarf2_cu *cu = per_cu->cu; |
ed2dc618 SM |
10377 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
10378 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
3e29f34a | 10379 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
10b3939b | 10380 | CORE_ADDR lowpc, highpc; |
43f3e411 | 10381 | struct compunit_symtab *cust; |
10b3939b | 10382 | CORE_ADDR baseaddr; |
4359dff1 | 10383 | struct block *static_block; |
3e29f34a | 10384 | CORE_ADDR addr; |
10b3939b DJ |
10385 | |
10386 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
10387 | ||
c89b44cd TT |
10388 | /* Clear the list here in case something was left over. */ |
10389 | cu->method_list.clear (); | |
10b3939b | 10390 | |
95554aad TT |
10391 | cu->language = pretend_language; |
10392 | cu->language_defn = language_def (cu->language); | |
10393 | ||
c906108c | 10394 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 10395 | process_die (cu->dies, cu); |
c906108c | 10396 | |
a766d390 DE |
10397 | /* For now fudge the Go package. */ |
10398 | if (cu->language == language_go) | |
10399 | fixup_go_packaging (cu); | |
10400 | ||
5f48f8f3 | 10401 | /* Now that we have processed all the DIEs in the CU, all the types |
3da10d80 KS |
10402 | should be complete, and it should now be safe to compute all of the |
10403 | physnames. */ | |
10404 | compute_delayed_physnames (cu); | |
3da10d80 | 10405 | |
c9317f21 TT |
10406 | if (cu->language == language_rust) |
10407 | rust_union_quirks (cu); | |
10408 | ||
fae299cd DC |
10409 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
10410 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
10411 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 10412 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 10413 | |
3e29f34a | 10414 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
c24bdb02 | 10415 | static_block = cu->get_builder ()->end_symtab_get_static_block (addr, 0, 1); |
4359dff1 JK |
10416 | |
10417 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
10418 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
10419 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
10420 | addrmap to help ensure it has an accurate map of pc values belonging to | |
10421 | this comp unit. */ | |
10422 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
10423 | ||
c24bdb02 | 10424 | cust = cu->get_builder ()->end_symtab_from_static_block (static_block, |
804d2729 TT |
10425 | SECT_OFF_TEXT (objfile), |
10426 | 0); | |
c906108c | 10427 | |
43f3e411 | 10428 | if (cust != NULL) |
c906108c | 10429 | { |
df15bd07 | 10430 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 10431 | |
8be455d7 JK |
10432 | /* Set symtab language to language from DW_AT_language. If the |
10433 | compilation is from a C file generated by language preprocessors, do | |
10434 | not set the language if it was already deduced by start_subfile. */ | |
43f3e411 | 10435 | if (!(cu->language == language_c |
40e3ad0e | 10436 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
43f3e411 | 10437 | COMPUNIT_FILETABS (cust)->language = cu->language; |
8be455d7 JK |
10438 | |
10439 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
10440 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
10441 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
10442 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
10443 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
10444 | |
10445 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
10446 | needed, it would be wrong due to missing DW_AT_producer there. | |
10447 | ||
10448 | Still one can confuse GDB by using non-standard GCC compilation | |
10449 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
5f48f8f3 | 10450 | */ |
ab260dad | 10451 | if (cu->has_loclist && gcc_4_minor >= 5) |
43f3e411 | 10452 | cust->locations_valid = 1; |
e0d00bc7 JK |
10453 | |
10454 | if (gcc_4_minor >= 5) | |
43f3e411 | 10455 | cust->epilogue_unwind_valid = 1; |
96408a79 | 10456 | |
43f3e411 | 10457 | cust->call_site_htab = cu->call_site_htab; |
c906108c | 10458 | } |
9291a0cd TT |
10459 | |
10460 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 10461 | per_cu->v.quick->compunit_symtab = cust; |
9291a0cd TT |
10462 | else |
10463 | { | |
10464 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 10465 | pst->compunit_symtab = cust; |
9291a0cd TT |
10466 | pst->readin = 1; |
10467 | } | |
c906108c | 10468 | |
95554aad | 10469 | /* Push it for inclusion processing later. */ |
c5d0225d | 10470 | dwarf2_per_objfile->just_read_cus.push_back (per_cu); |
804d2729 TT |
10471 | |
10472 | /* Not needed any more. */ | |
c24bdb02 | 10473 | cu->reset_builder (); |
f4dc4d17 | 10474 | } |
45cfd468 | 10475 | |
f4dc4d17 DE |
10476 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
10477 | already been loaded into memory. */ | |
10478 | ||
10479 | static void | |
10480 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
10481 | enum language pretend_language) | |
10482 | { | |
10483 | struct dwarf2_cu *cu = per_cu->cu; | |
ed2dc618 SM |
10484 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
10485 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
43f3e411 | 10486 | struct compunit_symtab *cust; |
0186c6a7 DE |
10487 | struct signatured_type *sig_type; |
10488 | ||
10489 | gdb_assert (per_cu->is_debug_types); | |
10490 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 | 10491 | |
c89b44cd TT |
10492 | /* Clear the list here in case something was left over. */ |
10493 | cu->method_list.clear (); | |
f4dc4d17 | 10494 | |
f4dc4d17 DE |
10495 | cu->language = pretend_language; |
10496 | cu->language_defn = language_def (cu->language); | |
10497 | ||
10498 | /* The symbol tables are set up in read_type_unit_scope. */ | |
10499 | process_die (cu->dies, cu); | |
10500 | ||
10501 | /* For now fudge the Go package. */ | |
10502 | if (cu->language == language_go) | |
10503 | fixup_go_packaging (cu); | |
10504 | ||
5f48f8f3 | 10505 | /* Now that we have processed all the DIEs in the CU, all the types |
f4dc4d17 DE |
10506 | should be complete, and it should now be safe to compute all of the |
10507 | physnames. */ | |
10508 | compute_delayed_physnames (cu); | |
f4dc4d17 | 10509 | |
c9317f21 TT |
10510 | if (cu->language == language_rust) |
10511 | rust_union_quirks (cu); | |
10512 | ||
f4dc4d17 DE |
10513 | /* TUs share symbol tables. |
10514 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
10515 | of it with end_expandable_symtab. Otherwise, complete the addition of |
10516 | this TU's symbols to the existing symtab. */ | |
43f3e411 | 10517 | if (sig_type->type_unit_group->compunit_symtab == NULL) |
45cfd468 | 10518 | { |
c24bdb02 KS |
10519 | buildsym_compunit *builder = cu->get_builder (); |
10520 | cust = builder->end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); | |
43f3e411 | 10521 | sig_type->type_unit_group->compunit_symtab = cust; |
f4dc4d17 | 10522 | |
43f3e411 | 10523 | if (cust != NULL) |
f4dc4d17 DE |
10524 | { |
10525 | /* Set symtab language to language from DW_AT_language. If the | |
10526 | compilation is from a C file generated by language preprocessors, | |
10527 | do not set the language if it was already deduced by | |
10528 | start_subfile. */ | |
43f3e411 DE |
10529 | if (!(cu->language == language_c |
10530 | && COMPUNIT_FILETABS (cust)->language != language_c)) | |
10531 | COMPUNIT_FILETABS (cust)->language = cu->language; | |
f4dc4d17 DE |
10532 | } |
10533 | } | |
10534 | else | |
10535 | { | |
c24bdb02 | 10536 | cu->get_builder ()->augment_type_symtab (); |
43f3e411 | 10537 | cust = sig_type->type_unit_group->compunit_symtab; |
f4dc4d17 DE |
10538 | } |
10539 | ||
10540 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 10541 | per_cu->v.quick->compunit_symtab = cust; |
f4dc4d17 DE |
10542 | else |
10543 | { | |
10544 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 10545 | pst->compunit_symtab = cust; |
f4dc4d17 | 10546 | pst->readin = 1; |
45cfd468 | 10547 | } |
804d2729 TT |
10548 | |
10549 | /* Not needed any more. */ | |
c24bdb02 | 10550 | cu->reset_builder (); |
c906108c SS |
10551 | } |
10552 | ||
95554aad TT |
10553 | /* Process an imported unit DIE. */ |
10554 | ||
10555 | static void | |
10556 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
10557 | { | |
10558 | struct attribute *attr; | |
10559 | ||
f4dc4d17 DE |
10560 | /* For now we don't handle imported units in type units. */ |
10561 | if (cu->per_cu->is_debug_types) | |
10562 | { | |
10563 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
10564 | " supported in type units [in module %s]"), | |
518817b3 | 10565 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
f4dc4d17 DE |
10566 | } |
10567 | ||
95554aad TT |
10568 | attr = dwarf2_attr (die, DW_AT_import, cu); |
10569 | if (attr != NULL) | |
10570 | { | |
9c541725 PA |
10571 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
10572 | bool is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); | |
10573 | dwarf2_per_cu_data *per_cu | |
e3b94546 | 10574 | = dwarf2_find_containing_comp_unit (sect_off, is_dwz, |
518817b3 | 10575 | cu->per_cu->dwarf2_per_objfile); |
95554aad | 10576 | |
69d751e3 | 10577 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad | 10578 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
58f0c718 | 10579 | load_full_comp_unit (per_cu, false, cu->language); |
95554aad | 10580 | |
796a7ff8 | 10581 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, |
95554aad TT |
10582 | per_cu); |
10583 | } | |
10584 | } | |
10585 | ||
4c8aa72d PA |
10586 | /* RAII object that represents a process_die scope: i.e., |
10587 | starts/finishes processing a DIE. */ | |
10588 | class process_die_scope | |
adde2bff | 10589 | { |
4c8aa72d PA |
10590 | public: |
10591 | process_die_scope (die_info *die, dwarf2_cu *cu) | |
10592 | : m_die (die), m_cu (cu) | |
10593 | { | |
10594 | /* We should only be processing DIEs not already in process. */ | |
10595 | gdb_assert (!m_die->in_process); | |
10596 | m_die->in_process = true; | |
10597 | } | |
8c3cb9fa | 10598 | |
4c8aa72d PA |
10599 | ~process_die_scope () |
10600 | { | |
10601 | m_die->in_process = false; | |
10602 | ||
10603 | /* If we're done processing the DIE for the CU that owns the line | |
10604 | header, we don't need the line header anymore. */ | |
10605 | if (m_cu->line_header_die_owner == m_die) | |
10606 | { | |
10607 | delete m_cu->line_header; | |
10608 | m_cu->line_header = NULL; | |
10609 | m_cu->line_header_die_owner = NULL; | |
10610 | } | |
10611 | } | |
10612 | ||
10613 | private: | |
10614 | die_info *m_die; | |
10615 | dwarf2_cu *m_cu; | |
10616 | }; | |
adde2bff | 10617 | |
c906108c SS |
10618 | /* Process a die and its children. */ |
10619 | ||
10620 | static void | |
e7c27a73 | 10621 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 10622 | { |
4c8aa72d | 10623 | process_die_scope scope (die, cu); |
adde2bff | 10624 | |
c906108c SS |
10625 | switch (die->tag) |
10626 | { | |
10627 | case DW_TAG_padding: | |
10628 | break; | |
10629 | case DW_TAG_compile_unit: | |
95554aad | 10630 | case DW_TAG_partial_unit: |
e7c27a73 | 10631 | read_file_scope (die, cu); |
c906108c | 10632 | break; |
348e048f DE |
10633 | case DW_TAG_type_unit: |
10634 | read_type_unit_scope (die, cu); | |
10635 | break; | |
c906108c | 10636 | case DW_TAG_subprogram: |
0a4b0913 AB |
10637 | /* Nested subprograms in Fortran get a prefix. */ |
10638 | if (cu->language == language_fortran | |
10639 | && die->parent != NULL | |
10640 | && die->parent->tag == DW_TAG_subprogram) | |
10641 | cu->processing_has_namespace_info = true; | |
10642 | /* Fall through. */ | |
c906108c | 10643 | case DW_TAG_inlined_subroutine: |
edb3359d | 10644 | read_func_scope (die, cu); |
c906108c SS |
10645 | break; |
10646 | case DW_TAG_lexical_block: | |
14898363 L |
10647 | case DW_TAG_try_block: |
10648 | case DW_TAG_catch_block: | |
e7c27a73 | 10649 | read_lexical_block_scope (die, cu); |
c906108c | 10650 | break; |
216f72a1 | 10651 | case DW_TAG_call_site: |
96408a79 SA |
10652 | case DW_TAG_GNU_call_site: |
10653 | read_call_site_scope (die, cu); | |
10654 | break; | |
c906108c | 10655 | case DW_TAG_class_type: |
680b30c7 | 10656 | case DW_TAG_interface_type: |
c906108c SS |
10657 | case DW_TAG_structure_type: |
10658 | case DW_TAG_union_type: | |
134d01f1 | 10659 | process_structure_scope (die, cu); |
c906108c SS |
10660 | break; |
10661 | case DW_TAG_enumeration_type: | |
134d01f1 | 10662 | process_enumeration_scope (die, cu); |
c906108c | 10663 | break; |
134d01f1 | 10664 | |
f792889a DJ |
10665 | /* These dies have a type, but processing them does not create |
10666 | a symbol or recurse to process the children. Therefore we can | |
10667 | read them on-demand through read_type_die. */ | |
c906108c | 10668 | case DW_TAG_subroutine_type: |
72019c9c | 10669 | case DW_TAG_set_type: |
c906108c | 10670 | case DW_TAG_array_type: |
c906108c | 10671 | case DW_TAG_pointer_type: |
c906108c | 10672 | case DW_TAG_ptr_to_member_type: |
c906108c | 10673 | case DW_TAG_reference_type: |
4297a3f0 | 10674 | case DW_TAG_rvalue_reference_type: |
c906108c | 10675 | case DW_TAG_string_type: |
c906108c | 10676 | break; |
134d01f1 | 10677 | |
c906108c | 10678 | case DW_TAG_base_type: |
a02abb62 | 10679 | case DW_TAG_subrange_type: |
cb249c71 | 10680 | case DW_TAG_typedef: |
134d01f1 DJ |
10681 | /* Add a typedef symbol for the type definition, if it has a |
10682 | DW_AT_name. */ | |
f792889a | 10683 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 10684 | break; |
c906108c | 10685 | case DW_TAG_common_block: |
e7c27a73 | 10686 | read_common_block (die, cu); |
c906108c SS |
10687 | break; |
10688 | case DW_TAG_common_inclusion: | |
10689 | break; | |
d9fa45fe | 10690 | case DW_TAG_namespace: |
9068261f | 10691 | cu->processing_has_namespace_info = true; |
e7c27a73 | 10692 | read_namespace (die, cu); |
d9fa45fe | 10693 | break; |
5d7cb8df | 10694 | case DW_TAG_module: |
9068261f | 10695 | cu->processing_has_namespace_info = true; |
5d7cb8df JK |
10696 | read_module (die, cu); |
10697 | break; | |
d9fa45fe | 10698 | case DW_TAG_imported_declaration: |
9068261f | 10699 | cu->processing_has_namespace_info = true; |
74921315 KS |
10700 | if (read_namespace_alias (die, cu)) |
10701 | break; | |
86a73007 TT |
10702 | /* The declaration is not a global namespace alias. */ |
10703 | /* Fall through. */ | |
d9fa45fe | 10704 | case DW_TAG_imported_module: |
9068261f | 10705 | cu->processing_has_namespace_info = true; |
27aa8d6a SW |
10706 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
10707 | || cu->language != language_fortran)) | |
b98664d3 | 10708 | complaint (_("Tag '%s' has unexpected children"), |
27aa8d6a SW |
10709 | dwarf_tag_name (die->tag)); |
10710 | read_import_statement (die, cu); | |
d9fa45fe | 10711 | break; |
95554aad TT |
10712 | |
10713 | case DW_TAG_imported_unit: | |
10714 | process_imported_unit_die (die, cu); | |
10715 | break; | |
10716 | ||
71a3c369 TT |
10717 | case DW_TAG_variable: |
10718 | read_variable (die, cu); | |
10719 | break; | |
10720 | ||
c906108c | 10721 | default: |
e7c27a73 | 10722 | new_symbol (die, NULL, cu); |
c906108c SS |
10723 | break; |
10724 | } | |
10725 | } | |
ca69b9e6 DE |
10726 | \f |
10727 | /* DWARF name computation. */ | |
c906108c | 10728 | |
94af9270 KS |
10729 | /* A helper function for dwarf2_compute_name which determines whether DIE |
10730 | needs to have the name of the scope prepended to the name listed in the | |
10731 | die. */ | |
10732 | ||
10733 | static int | |
10734 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
10735 | { | |
1c809c68 TT |
10736 | struct attribute *attr; |
10737 | ||
94af9270 KS |
10738 | switch (die->tag) |
10739 | { | |
10740 | case DW_TAG_namespace: | |
10741 | case DW_TAG_typedef: | |
10742 | case DW_TAG_class_type: | |
10743 | case DW_TAG_interface_type: | |
10744 | case DW_TAG_structure_type: | |
10745 | case DW_TAG_union_type: | |
10746 | case DW_TAG_enumeration_type: | |
10747 | case DW_TAG_enumerator: | |
10748 | case DW_TAG_subprogram: | |
08a76f8a | 10749 | case DW_TAG_inlined_subroutine: |
94af9270 | 10750 | case DW_TAG_member: |
74921315 | 10751 | case DW_TAG_imported_declaration: |
94af9270 KS |
10752 | return 1; |
10753 | ||
10754 | case DW_TAG_variable: | |
c2b0a229 | 10755 | case DW_TAG_constant: |
94af9270 KS |
10756 | /* We only need to prefix "globally" visible variables. These include |
10757 | any variable marked with DW_AT_external or any variable that | |
10758 | lives in a namespace. [Variables in anonymous namespaces | |
10759 | require prefixing, but they are not DW_AT_external.] */ | |
10760 | ||
10761 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
10762 | { | |
10763 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 10764 | |
94af9270 KS |
10765 | return die_needs_namespace (die_specification (die, &spec_cu), |
10766 | spec_cu); | |
10767 | } | |
10768 | ||
1c809c68 | 10769 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
10770 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
10771 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
10772 | return 0; |
10773 | /* A variable in a lexical block of some kind does not need a | |
10774 | namespace, even though in C++ such variables may be external | |
10775 | and have a mangled name. */ | |
10776 | if (die->parent->tag == DW_TAG_lexical_block | |
10777 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
10778 | || die->parent->tag == DW_TAG_catch_block |
10779 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
10780 | return 0; |
10781 | return 1; | |
94af9270 KS |
10782 | |
10783 | default: | |
10784 | return 0; | |
10785 | } | |
10786 | } | |
10787 | ||
73b9be8b KS |
10788 | /* Return the DIE's linkage name attribute, either DW_AT_linkage_name |
10789 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
10790 | defined for the given DIE. */ | |
10791 | ||
10792 | static struct attribute * | |
10793 | dw2_linkage_name_attr (struct die_info *die, struct dwarf2_cu *cu) | |
10794 | { | |
10795 | struct attribute *attr; | |
10796 | ||
10797 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
10798 | if (attr == NULL) | |
10799 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
10800 | ||
10801 | return attr; | |
10802 | } | |
10803 | ||
10804 | /* Return the DIE's linkage name as a string, either DW_AT_linkage_name | |
10805 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
10806 | defined for the given DIE. */ | |
10807 | ||
10808 | static const char * | |
10809 | dw2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) | |
10810 | { | |
10811 | const char *linkage_name; | |
10812 | ||
10813 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); | |
10814 | if (linkage_name == NULL) | |
10815 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
10816 | ||
10817 | return linkage_name; | |
10818 | } | |
10819 | ||
94af9270 | 10820 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 | 10821 | compute the physname for the object, which include a method's: |
9c37b5ae | 10822 | - formal parameters (C++), |
a766d390 | 10823 | - receiver type (Go), |
a766d390 DE |
10824 | |
10825 | The term "physname" is a bit confusing. | |
10826 | For C++, for example, it is the demangled name. | |
10827 | For Go, for example, it's the mangled name. | |
94af9270 | 10828 | |
af6b7be1 JB |
10829 | For Ada, return the DIE's linkage name rather than the fully qualified |
10830 | name. PHYSNAME is ignored.. | |
10831 | ||
94af9270 KS |
10832 | The result is allocated on the objfile_obstack and canonicalized. */ |
10833 | ||
10834 | static const char * | |
15d034d0 TT |
10835 | dwarf2_compute_name (const char *name, |
10836 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
10837 | int physname) |
10838 | { | |
518817b3 | 10839 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
bb5ed363 | 10840 | |
94af9270 KS |
10841 | if (name == NULL) |
10842 | name = dwarf2_name (die, cu); | |
10843 | ||
2ee7123e DE |
10844 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
10845 | but otherwise compute it by typename_concat inside GDB. | |
10846 | FIXME: Actually this is not really true, or at least not always true. | |
10847 | It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle | |
5e2db402 | 10848 | Fortran names because there is no mangling standard. So new_symbol |
2ee7123e DE |
10849 | will set the demangled name to the result of dwarf2_full_name, and it is |
10850 | the demangled name that GDB uses if it exists. */ | |
f55ee35c JK |
10851 | if (cu->language == language_ada |
10852 | || (cu->language == language_fortran && physname)) | |
10853 | { | |
10854 | /* For Ada unit, we prefer the linkage name over the name, as | |
10855 | the former contains the exported name, which the user expects | |
10856 | to be able to reference. Ideally, we want the user to be able | |
10857 | to reference this entity using either natural or linkage name, | |
10858 | but we haven't started looking at this enhancement yet. */ | |
73b9be8b | 10859 | const char *linkage_name = dw2_linkage_name (die, cu); |
f55ee35c | 10860 | |
2ee7123e DE |
10861 | if (linkage_name != NULL) |
10862 | return linkage_name; | |
f55ee35c JK |
10863 | } |
10864 | ||
94af9270 KS |
10865 | /* These are the only languages we know how to qualify names in. */ |
10866 | if (name != NULL | |
9c37b5ae | 10867 | && (cu->language == language_cplus |
c44af4eb TT |
10868 | || cu->language == language_fortran || cu->language == language_d |
10869 | || cu->language == language_rust)) | |
94af9270 KS |
10870 | { |
10871 | if (die_needs_namespace (die, cu)) | |
10872 | { | |
0d5cff50 | 10873 | const char *prefix; |
34a68019 | 10874 | const char *canonical_name = NULL; |
94af9270 | 10875 | |
d7e74731 PA |
10876 | string_file buf; |
10877 | ||
94af9270 | 10878 | prefix = determine_prefix (die, cu); |
94af9270 KS |
10879 | if (*prefix != '\0') |
10880 | { | |
f55ee35c JK |
10881 | char *prefixed_name = typename_concat (NULL, prefix, name, |
10882 | physname, cu); | |
9a619af0 | 10883 | |
d7e74731 | 10884 | buf.puts (prefixed_name); |
94af9270 KS |
10885 | xfree (prefixed_name); |
10886 | } | |
10887 | else | |
d7e74731 | 10888 | buf.puts (name); |
94af9270 | 10889 | |
98bfdba5 PA |
10890 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
10891 | as children with DW_TAG_template_type_param or | |
10892 | DW_TAG_value_type_param. If the latter, add them to the name | |
10893 | here. If the name already has template parameters, then | |
10894 | skip this step; some versions of GCC emit both, and | |
10895 | it is more efficient to use the pre-computed name. | |
10896 | ||
10897 | Something to keep in mind about this process: it is very | |
10898 | unlikely, or in some cases downright impossible, to produce | |
10899 | something that will match the mangled name of a function. | |
10900 | If the definition of the function has the same debug info, | |
10901 | we should be able to match up with it anyway. But fallbacks | |
10902 | using the minimal symbol, for instance to find a method | |
10903 | implemented in a stripped copy of libstdc++, will not work. | |
10904 | If we do not have debug info for the definition, we will have to | |
10905 | match them up some other way. | |
10906 | ||
10907 | When we do name matching there is a related problem with function | |
10908 | templates; two instantiated function templates are allowed to | |
10909 | differ only by their return types, which we do not add here. */ | |
10910 | ||
10911 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
10912 | { | |
10913 | struct attribute *attr; | |
10914 | struct die_info *child; | |
10915 | int first = 1; | |
10916 | ||
10917 | die->building_fullname = 1; | |
10918 | ||
10919 | for (child = die->child; child != NULL; child = child->sibling) | |
10920 | { | |
10921 | struct type *type; | |
12df843f | 10922 | LONGEST value; |
d521ce57 | 10923 | const gdb_byte *bytes; |
98bfdba5 PA |
10924 | struct dwarf2_locexpr_baton *baton; |
10925 | struct value *v; | |
10926 | ||
10927 | if (child->tag != DW_TAG_template_type_param | |
10928 | && child->tag != DW_TAG_template_value_param) | |
10929 | continue; | |
10930 | ||
10931 | if (first) | |
10932 | { | |
d7e74731 | 10933 | buf.puts ("<"); |
98bfdba5 PA |
10934 | first = 0; |
10935 | } | |
10936 | else | |
d7e74731 | 10937 | buf.puts (", "); |
98bfdba5 PA |
10938 | |
10939 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
10940 | if (attr == NULL) | |
10941 | { | |
b98664d3 | 10942 | complaint (_("template parameter missing DW_AT_type")); |
d7e74731 | 10943 | buf.puts ("UNKNOWN_TYPE"); |
98bfdba5 PA |
10944 | continue; |
10945 | } | |
10946 | type = die_type (child, cu); | |
10947 | ||
10948 | if (child->tag == DW_TAG_template_type_param) | |
10949 | { | |
c1ec8cea TT |
10950 | c_print_type (type, "", &buf, -1, 0, cu->language, |
10951 | &type_print_raw_options); | |
98bfdba5 PA |
10952 | continue; |
10953 | } | |
10954 | ||
10955 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
10956 | if (attr == NULL) | |
10957 | { | |
b98664d3 | 10958 | complaint (_("template parameter missing " |
3e43a32a | 10959 | "DW_AT_const_value")); |
d7e74731 | 10960 | buf.puts ("UNKNOWN_VALUE"); |
98bfdba5 PA |
10961 | continue; |
10962 | } | |
10963 | ||
10964 | dwarf2_const_value_attr (attr, type, name, | |
10965 | &cu->comp_unit_obstack, cu, | |
10966 | &value, &bytes, &baton); | |
10967 | ||
10968 | if (TYPE_NOSIGN (type)) | |
10969 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
10970 | changed, this can use value_print instead. */ | |
d7e74731 | 10971 | c_printchar (value, type, &buf); |
98bfdba5 PA |
10972 | else |
10973 | { | |
10974 | struct value_print_options opts; | |
10975 | ||
10976 | if (baton != NULL) | |
10977 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
10978 | baton->data, | |
10979 | baton->size, | |
10980 | baton->per_cu); | |
10981 | else if (bytes != NULL) | |
10982 | { | |
10983 | v = allocate_value (type); | |
10984 | memcpy (value_contents_writeable (v), bytes, | |
10985 | TYPE_LENGTH (type)); | |
10986 | } | |
10987 | else | |
10988 | v = value_from_longest (type, value); | |
10989 | ||
3e43a32a MS |
10990 | /* Specify decimal so that we do not depend on |
10991 | the radix. */ | |
98bfdba5 PA |
10992 | get_formatted_print_options (&opts, 'd'); |
10993 | opts.raw = 1; | |
d7e74731 | 10994 | value_print (v, &buf, &opts); |
98bfdba5 | 10995 | release_value (v); |
98bfdba5 PA |
10996 | } |
10997 | } | |
10998 | ||
10999 | die->building_fullname = 0; | |
11000 | ||
11001 | if (!first) | |
11002 | { | |
11003 | /* Close the argument list, with a space if necessary | |
11004 | (nested templates). */ | |
d7e74731 PA |
11005 | if (!buf.empty () && buf.string ().back () == '>') |
11006 | buf.puts (" >"); | |
98bfdba5 | 11007 | else |
d7e74731 | 11008 | buf.puts (">"); |
98bfdba5 PA |
11009 | } |
11010 | } | |
11011 | ||
9c37b5ae | 11012 | /* For C++ methods, append formal parameter type |
94af9270 | 11013 | information, if PHYSNAME. */ |
6e70227d | 11014 | |
94af9270 | 11015 | if (physname && die->tag == DW_TAG_subprogram |
9c37b5ae | 11016 | && cu->language == language_cplus) |
94af9270 KS |
11017 | { |
11018 | struct type *type = read_type_die (die, cu); | |
11019 | ||
d7e74731 | 11020 | c_type_print_args (type, &buf, 1, cu->language, |
79d43c61 | 11021 | &type_print_raw_options); |
94af9270 | 11022 | |
9c37b5ae | 11023 | if (cu->language == language_cplus) |
94af9270 | 11024 | { |
60430eff DJ |
11025 | /* Assume that an artificial first parameter is |
11026 | "this", but do not crash if it is not. RealView | |
11027 | marks unnamed (and thus unused) parameters as | |
11028 | artificial; there is no way to differentiate | |
11029 | the two cases. */ | |
94af9270 KS |
11030 | if (TYPE_NFIELDS (type) > 0 |
11031 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 11032 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
11033 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
11034 | 0)))) | |
d7e74731 | 11035 | buf.puts (" const"); |
94af9270 KS |
11036 | } |
11037 | } | |
11038 | ||
d7e74731 | 11039 | const std::string &intermediate_name = buf.string (); |
94af9270 KS |
11040 | |
11041 | if (cu->language == language_cplus) | |
34a68019 | 11042 | canonical_name |
322a8516 | 11043 | = dwarf2_canonicalize_name (intermediate_name.c_str (), cu, |
34a68019 TT |
11044 | &objfile->per_bfd->storage_obstack); |
11045 | ||
11046 | /* If we only computed INTERMEDIATE_NAME, or if | |
11047 | INTERMEDIATE_NAME is already canonical, then we need to | |
11048 | copy it to the appropriate obstack. */ | |
322a8516 | 11049 | if (canonical_name == NULL || canonical_name == intermediate_name.c_str ()) |
efba19b0 TT |
11050 | name = obstack_strdup (&objfile->per_bfd->storage_obstack, |
11051 | intermediate_name); | |
34a68019 TT |
11052 | else |
11053 | name = canonical_name; | |
94af9270 KS |
11054 | } |
11055 | } | |
11056 | ||
11057 | return name; | |
11058 | } | |
11059 | ||
0114d602 DJ |
11060 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
11061 | If scope qualifiers are appropriate they will be added. The result | |
34a68019 | 11062 | will be allocated on the storage_obstack, or NULL if the DIE does |
94af9270 KS |
11063 | not have a name. NAME may either be from a previous call to |
11064 | dwarf2_name or NULL. | |
11065 | ||
9c37b5ae | 11066 | The output string will be canonicalized (if C++). */ |
0114d602 DJ |
11067 | |
11068 | static const char * | |
15d034d0 | 11069 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 11070 | { |
94af9270 KS |
11071 | return dwarf2_compute_name (name, die, cu, 0); |
11072 | } | |
0114d602 | 11073 | |
94af9270 KS |
11074 | /* Construct a physname for the given DIE in CU. NAME may either be |
11075 | from a previous call to dwarf2_name or NULL. The result will be | |
11076 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
11077 | name. | |
0114d602 | 11078 | |
9c37b5ae | 11079 | The output string will be canonicalized (if C++). */ |
0114d602 | 11080 | |
94af9270 | 11081 | static const char * |
15d034d0 | 11082 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 11083 | { |
518817b3 | 11084 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
900e11f9 | 11085 | const char *retval, *mangled = NULL, *canon = NULL; |
900e11f9 JK |
11086 | int need_copy = 1; |
11087 | ||
11088 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
11089 | on its own. */ | |
11090 | if (!die_needs_namespace (die, cu)) | |
11091 | return dwarf2_compute_name (name, die, cu, 1); | |
11092 | ||
73b9be8b | 11093 | mangled = dw2_linkage_name (die, cu); |
900e11f9 | 11094 | |
e98c9e7c TT |
11095 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
11096 | See https://github.com/rust-lang/rust/issues/32925. */ | |
11097 | if (cu->language == language_rust && mangled != NULL | |
11098 | && strchr (mangled, '{') != NULL) | |
11099 | mangled = NULL; | |
11100 | ||
900e11f9 JK |
11101 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB |
11102 | has computed. */ | |
791afaa2 | 11103 | gdb::unique_xmalloc_ptr<char> demangled; |
7d45c7c3 | 11104 | if (mangled != NULL) |
900e11f9 | 11105 | { |
900e11f9 | 11106 | |
59cc4834 JB |
11107 | if (language_def (cu->language)->la_store_sym_names_in_linkage_form_p) |
11108 | { | |
11109 | /* Do nothing (do not demangle the symbol name). */ | |
11110 | } | |
11111 | else if (cu->language == language_go) | |
a766d390 | 11112 | { |
5e2db402 TT |
11113 | /* This is a lie, but we already lie to the caller new_symbol. |
11114 | new_symbol assumes we return the mangled name. | |
a766d390 | 11115 | This just undoes that lie until things are cleaned up. */ |
a766d390 DE |
11116 | } |
11117 | else | |
11118 | { | |
0eb876f5 JB |
11119 | /* Use DMGL_RET_DROP for C++ template functions to suppress |
11120 | their return type. It is easier for GDB users to search | |
11121 | for such functions as `name(params)' than `long name(params)'. | |
11122 | In such case the minimal symbol names do not match the full | |
11123 | symbol names but for template functions there is never a need | |
11124 | to look up their definition from their declaration so | |
11125 | the only disadvantage remains the minimal symbol variant | |
11126 | `long name(params)' does not have the proper inferior type. */ | |
791afaa2 TT |
11127 | demangled.reset (gdb_demangle (mangled, |
11128 | (DMGL_PARAMS | DMGL_ANSI | |
11129 | | DMGL_RET_DROP))); | |
a766d390 | 11130 | } |
900e11f9 | 11131 | if (demangled) |
791afaa2 | 11132 | canon = demangled.get (); |
900e11f9 JK |
11133 | else |
11134 | { | |
11135 | canon = mangled; | |
11136 | need_copy = 0; | |
11137 | } | |
11138 | } | |
11139 | ||
11140 | if (canon == NULL || check_physname) | |
11141 | { | |
11142 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
11143 | ||
11144 | if (canon != NULL && strcmp (physname, canon) != 0) | |
11145 | { | |
11146 | /* It may not mean a bug in GDB. The compiler could also | |
11147 | compute DW_AT_linkage_name incorrectly. But in such case | |
11148 | GDB would need to be bug-to-bug compatible. */ | |
11149 | ||
b98664d3 | 11150 | complaint (_("Computed physname <%s> does not match demangled <%s> " |
9d8780f0 SM |
11151 | "(from linkage <%s>) - DIE at %s [in module %s]"), |
11152 | physname, canon, mangled, sect_offset_str (die->sect_off), | |
4262abfb | 11153 | objfile_name (objfile)); |
900e11f9 JK |
11154 | |
11155 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
11156 | is available here - over computed PHYSNAME. It is safer | |
11157 | against both buggy GDB and buggy compilers. */ | |
11158 | ||
11159 | retval = canon; | |
11160 | } | |
11161 | else | |
11162 | { | |
11163 | retval = physname; | |
11164 | need_copy = 0; | |
11165 | } | |
11166 | } | |
11167 | else | |
11168 | retval = canon; | |
11169 | ||
11170 | if (need_copy) | |
021887d8 | 11171 | retval = obstack_strdup (&objfile->per_bfd->storage_obstack, retval); |
900e11f9 | 11172 | |
900e11f9 | 11173 | return retval; |
0114d602 DJ |
11174 | } |
11175 | ||
74921315 KS |
11176 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
11177 | a new symbol for it. | |
11178 | ||
11179 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
11180 | ||
11181 | static int | |
11182 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
11183 | { | |
11184 | struct attribute *attr; | |
11185 | ||
11186 | /* If the die does not have a name, this is not a namespace | |
11187 | alias. */ | |
11188 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
11189 | if (attr != NULL) | |
11190 | { | |
11191 | int num; | |
11192 | struct die_info *d = die; | |
11193 | struct dwarf2_cu *imported_cu = cu; | |
11194 | ||
11195 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
11196 | keep inspecting DIEs until we hit the underlying import. */ | |
11197 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
11198 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
11199 | { | |
11200 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
11201 | if (attr == NULL) | |
11202 | break; | |
11203 | ||
11204 | d = follow_die_ref (d, attr, &imported_cu); | |
11205 | if (d->tag != DW_TAG_imported_declaration) | |
11206 | break; | |
11207 | } | |
11208 | ||
11209 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
11210 | { | |
b98664d3 | 11211 | complaint (_("DIE at %s has too many recursively imported " |
9d8780f0 | 11212 | "declarations"), sect_offset_str (d->sect_off)); |
74921315 KS |
11213 | return 0; |
11214 | } | |
11215 | ||
11216 | if (attr != NULL) | |
11217 | { | |
11218 | struct type *type; | |
9c541725 | 11219 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
74921315 | 11220 | |
9c541725 | 11221 | type = get_die_type_at_offset (sect_off, cu->per_cu); |
74921315 KS |
11222 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE) |
11223 | { | |
11224 | /* This declaration is a global namespace alias. Add | |
11225 | a symbol for it whose type is the aliased namespace. */ | |
11226 | new_symbol (die, type, cu); | |
11227 | return 1; | |
11228 | } | |
11229 | } | |
11230 | } | |
11231 | ||
11232 | return 0; | |
11233 | } | |
11234 | ||
22cee43f | 11235 | /* Return the using directives repository (global or local?) to use in the |
804d2729 | 11236 | current context for CU. |
22cee43f PMR |
11237 | |
11238 | For Ada, imported declarations can materialize renamings, which *may* be | |
11239 | global. However it is impossible (for now?) in DWARF to distinguish | |
11240 | "external" imported declarations and "static" ones. As all imported | |
11241 | declarations seem to be static in all other languages, make them all CU-wide | |
11242 | global only in Ada. */ | |
11243 | ||
11244 | static struct using_direct ** | |
804d2729 | 11245 | using_directives (struct dwarf2_cu *cu) |
22cee43f | 11246 | { |
c24bdb02 KS |
11247 | if (cu->language == language_ada |
11248 | && cu->get_builder ()->outermost_context_p ()) | |
11249 | return cu->get_builder ()->get_global_using_directives (); | |
22cee43f | 11250 | else |
c24bdb02 | 11251 | return cu->get_builder ()->get_local_using_directives (); |
22cee43f PMR |
11252 | } |
11253 | ||
27aa8d6a SW |
11254 | /* Read the import statement specified by the given die and record it. */ |
11255 | ||
11256 | static void | |
11257 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
11258 | { | |
518817b3 | 11259 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
27aa8d6a | 11260 | struct attribute *import_attr; |
32019081 | 11261 | struct die_info *imported_die, *child_die; |
de4affc9 | 11262 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 11263 | const char *imported_name; |
794684b6 | 11264 | const char *imported_name_prefix; |
13387711 SW |
11265 | const char *canonical_name; |
11266 | const char *import_alias; | |
11267 | const char *imported_declaration = NULL; | |
794684b6 | 11268 | const char *import_prefix; |
eb1e02fd | 11269 | std::vector<const char *> excludes; |
13387711 | 11270 | |
27aa8d6a SW |
11271 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
11272 | if (import_attr == NULL) | |
11273 | { | |
b98664d3 | 11274 | complaint (_("Tag '%s' has no DW_AT_import"), |
27aa8d6a SW |
11275 | dwarf_tag_name (die->tag)); |
11276 | return; | |
11277 | } | |
11278 | ||
de4affc9 CC |
11279 | imported_cu = cu; |
11280 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
11281 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
11282 | if (imported_name == NULL) |
11283 | { | |
11284 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
11285 | ||
11286 | The import in the following code: | |
11287 | namespace A | |
11288 | { | |
11289 | typedef int B; | |
11290 | } | |
11291 | ||
11292 | int main () | |
11293 | { | |
11294 | using A::B; | |
11295 | B b; | |
11296 | return b; | |
11297 | } | |
11298 | ||
11299 | ... | |
11300 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
11301 | <52> DW_AT_decl_file : 1 | |
11302 | <53> DW_AT_decl_line : 6 | |
11303 | <54> DW_AT_import : <0x75> | |
11304 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
11305 | <59> DW_AT_name : B | |
11306 | <5b> DW_AT_decl_file : 1 | |
11307 | <5c> DW_AT_decl_line : 2 | |
11308 | <5d> DW_AT_type : <0x6e> | |
11309 | ... | |
11310 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
11311 | <76> DW_AT_byte_size : 4 | |
11312 | <77> DW_AT_encoding : 5 (signed) | |
11313 | ||
11314 | imports the wrong die ( 0x75 instead of 0x58 ). | |
11315 | This case will be ignored until the gcc bug is fixed. */ | |
11316 | return; | |
11317 | } | |
11318 | ||
82856980 SW |
11319 | /* Figure out the local name after import. */ |
11320 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 11321 | |
794684b6 SW |
11322 | /* Figure out where the statement is being imported to. */ |
11323 | import_prefix = determine_prefix (die, cu); | |
11324 | ||
11325 | /* Figure out what the scope of the imported die is and prepend it | |
11326 | to the name of the imported die. */ | |
de4affc9 | 11327 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 11328 | |
f55ee35c JK |
11329 | if (imported_die->tag != DW_TAG_namespace |
11330 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 11331 | { |
13387711 SW |
11332 | imported_declaration = imported_name; |
11333 | canonical_name = imported_name_prefix; | |
794684b6 | 11334 | } |
13387711 | 11335 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 | 11336 | canonical_name = obconcat (&objfile->objfile_obstack, |
45280282 IB |
11337 | imported_name_prefix, |
11338 | (cu->language == language_d ? "." : "::"), | |
11339 | imported_name, (char *) NULL); | |
13387711 SW |
11340 | else |
11341 | canonical_name = imported_name; | |
794684b6 | 11342 | |
32019081 JK |
11343 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) |
11344 | for (child_die = die->child; child_die && child_die->tag; | |
11345 | child_die = sibling_die (child_die)) | |
11346 | { | |
11347 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
11348 | represented by an imported module entry with an import attribute | |
11349 | referring to the module and owned entries corresponding to those | |
11350 | entities that are renamed as part of being imported. */ | |
11351 | ||
11352 | if (child_die->tag != DW_TAG_imported_declaration) | |
11353 | { | |
b98664d3 | 11354 | complaint (_("child DW_TAG_imported_declaration expected " |
9d8780f0 SM |
11355 | "- DIE at %s [in module %s]"), |
11356 | sect_offset_str (child_die->sect_off), | |
11357 | objfile_name (objfile)); | |
32019081 JK |
11358 | continue; |
11359 | } | |
11360 | ||
11361 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
11362 | if (import_attr == NULL) | |
11363 | { | |
b98664d3 | 11364 | complaint (_("Tag '%s' has no DW_AT_import"), |
32019081 JK |
11365 | dwarf_tag_name (child_die->tag)); |
11366 | continue; | |
11367 | } | |
11368 | ||
11369 | imported_cu = cu; | |
11370 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
11371 | &imported_cu); | |
11372 | imported_name = dwarf2_name (imported_die, imported_cu); | |
11373 | if (imported_name == NULL) | |
11374 | { | |
b98664d3 | 11375 | complaint (_("child DW_TAG_imported_declaration has unknown " |
9d8780f0 SM |
11376 | "imported name - DIE at %s [in module %s]"), |
11377 | sect_offset_str (child_die->sect_off), | |
11378 | objfile_name (objfile)); | |
32019081 JK |
11379 | continue; |
11380 | } | |
11381 | ||
eb1e02fd | 11382 | excludes.push_back (imported_name); |
32019081 JK |
11383 | |
11384 | process_die (child_die, cu); | |
11385 | } | |
11386 | ||
804d2729 | 11387 | add_using_directive (using_directives (cu), |
22cee43f PMR |
11388 | import_prefix, |
11389 | canonical_name, | |
11390 | import_alias, | |
11391 | imported_declaration, | |
11392 | excludes, | |
11393 | 0, | |
11394 | &objfile->objfile_obstack); | |
27aa8d6a SW |
11395 | } |
11396 | ||
5230b05a WT |
11397 | /* ICC<14 does not output the required DW_AT_declaration on incomplete |
11398 | types, but gives them a size of zero. Starting with version 14, | |
11399 | ICC is compatible with GCC. */ | |
11400 | ||
9068261f | 11401 | static bool |
5230b05a WT |
11402 | producer_is_icc_lt_14 (struct dwarf2_cu *cu) |
11403 | { | |
11404 | if (!cu->checked_producer) | |
11405 | check_producer (cu); | |
11406 | ||
11407 | return cu->producer_is_icc_lt_14; | |
11408 | } | |
11409 | ||
eb77c9df AB |
11410 | /* ICC generates a DW_AT_type for C void functions. This was observed on |
11411 | ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2) | |
11412 | which says that void functions should not have a DW_AT_type. */ | |
11413 | ||
11414 | static bool | |
11415 | producer_is_icc (struct dwarf2_cu *cu) | |
11416 | { | |
11417 | if (!cu->checked_producer) | |
11418 | check_producer (cu); | |
11419 | ||
11420 | return cu->producer_is_icc; | |
11421 | } | |
11422 | ||
1b80a9fa JK |
11423 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
11424 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
11425 | this, it was first present in GCC release 4.3.0. */ | |
11426 | ||
9068261f | 11427 | static bool |
1b80a9fa JK |
11428 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) |
11429 | { | |
11430 | if (!cu->checked_producer) | |
11431 | check_producer (cu); | |
11432 | ||
11433 | return cu->producer_is_gcc_lt_4_3; | |
11434 | } | |
11435 | ||
d721ba37 PA |
11436 | static file_and_directory |
11437 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu) | |
9291a0cd | 11438 | { |
d721ba37 PA |
11439 | file_and_directory res; |
11440 | ||
9291a0cd TT |
11441 | /* Find the filename. Do not use dwarf2_name here, since the filename |
11442 | is not a source language identifier. */ | |
d721ba37 PA |
11443 | res.name = dwarf2_string_attr (die, DW_AT_name, cu); |
11444 | res.comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); | |
9291a0cd | 11445 | |
d721ba37 PA |
11446 | if (res.comp_dir == NULL |
11447 | && producer_is_gcc_lt_4_3 (cu) && res.name != NULL | |
11448 | && IS_ABSOLUTE_PATH (res.name)) | |
9291a0cd | 11449 | { |
d721ba37 PA |
11450 | res.comp_dir_storage = ldirname (res.name); |
11451 | if (!res.comp_dir_storage.empty ()) | |
11452 | res.comp_dir = res.comp_dir_storage.c_str (); | |
9291a0cd | 11453 | } |
d721ba37 | 11454 | if (res.comp_dir != NULL) |
9291a0cd TT |
11455 | { |
11456 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
11457 | directory, get rid of it. */ | |
d721ba37 | 11458 | const char *cp = strchr (res.comp_dir, ':'); |
9291a0cd | 11459 | |
d721ba37 PA |
11460 | if (cp && cp != res.comp_dir && cp[-1] == '.' && cp[1] == '/') |
11461 | res.comp_dir = cp + 1; | |
9291a0cd TT |
11462 | } |
11463 | ||
d721ba37 PA |
11464 | if (res.name == NULL) |
11465 | res.name = "<unknown>"; | |
11466 | ||
11467 | return res; | |
9291a0cd TT |
11468 | } |
11469 | ||
f4dc4d17 DE |
11470 | /* Handle DW_AT_stmt_list for a compilation unit. |
11471 | DIE is the DW_TAG_compile_unit die for CU. | |
c3b7b696 YQ |
11472 | COMP_DIR is the compilation directory. LOWPC is passed to |
11473 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ | |
2ab95328 TT |
11474 | |
11475 | static void | |
11476 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
c3b7b696 | 11477 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
2ab95328 | 11478 | { |
518817b3 SM |
11479 | struct dwarf2_per_objfile *dwarf2_per_objfile |
11480 | = cu->per_cu->dwarf2_per_objfile; | |
527f3840 | 11481 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ab95328 | 11482 | struct attribute *attr; |
527f3840 JK |
11483 | struct line_header line_header_local; |
11484 | hashval_t line_header_local_hash; | |
527f3840 JK |
11485 | void **slot; |
11486 | int decode_mapping; | |
2ab95328 | 11487 | |
f4dc4d17 DE |
11488 | gdb_assert (! cu->per_cu->is_debug_types); |
11489 | ||
2ab95328 | 11490 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
527f3840 JK |
11491 | if (attr == NULL) |
11492 | return; | |
11493 | ||
9c541725 | 11494 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
527f3840 JK |
11495 | |
11496 | /* The line header hash table is only created if needed (it exists to | |
11497 | prevent redundant reading of the line table for partial_units). | |
11498 | If we're given a partial_unit, we'll need it. If we're given a | |
11499 | compile_unit, then use the line header hash table if it's already | |
11500 | created, but don't create one just yet. */ | |
11501 | ||
11502 | if (dwarf2_per_objfile->line_header_hash == NULL | |
11503 | && die->tag == DW_TAG_partial_unit) | |
2ab95328 | 11504 | { |
527f3840 JK |
11505 | dwarf2_per_objfile->line_header_hash |
11506 | = htab_create_alloc_ex (127, line_header_hash_voidp, | |
11507 | line_header_eq_voidp, | |
11508 | free_line_header_voidp, | |
11509 | &objfile->objfile_obstack, | |
11510 | hashtab_obstack_allocate, | |
11511 | dummy_obstack_deallocate); | |
11512 | } | |
2ab95328 | 11513 | |
9c541725 | 11514 | line_header_local.sect_off = line_offset; |
527f3840 JK |
11515 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; |
11516 | line_header_local_hash = line_header_hash (&line_header_local); | |
11517 | if (dwarf2_per_objfile->line_header_hash != NULL) | |
11518 | { | |
11519 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
11520 | &line_header_local, | |
11521 | line_header_local_hash, NO_INSERT); | |
11522 | ||
11523 | /* For DW_TAG_compile_unit we need info like symtab::linetable which | |
11524 | is not present in *SLOT (since if there is something in *SLOT then | |
11525 | it will be for a partial_unit). */ | |
11526 | if (die->tag == DW_TAG_partial_unit && slot != NULL) | |
dee91e82 | 11527 | { |
527f3840 | 11528 | gdb_assert (*slot != NULL); |
9a3c8263 | 11529 | cu->line_header = (struct line_header *) *slot; |
527f3840 | 11530 | return; |
dee91e82 | 11531 | } |
2ab95328 | 11532 | } |
527f3840 JK |
11533 | |
11534 | /* dwarf_decode_line_header does not yet provide sufficient information. | |
11535 | We always have to call also dwarf_decode_lines for it. */ | |
fff8551c PA |
11536 | line_header_up lh = dwarf_decode_line_header (line_offset, cu); |
11537 | if (lh == NULL) | |
527f3840 | 11538 | return; |
4c8aa72d PA |
11539 | |
11540 | cu->line_header = lh.release (); | |
11541 | cu->line_header_die_owner = die; | |
527f3840 JK |
11542 | |
11543 | if (dwarf2_per_objfile->line_header_hash == NULL) | |
11544 | slot = NULL; | |
11545 | else | |
11546 | { | |
11547 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
11548 | &line_header_local, | |
11549 | line_header_local_hash, INSERT); | |
11550 | gdb_assert (slot != NULL); | |
11551 | } | |
11552 | if (slot != NULL && *slot == NULL) | |
11553 | { | |
11554 | /* This newly decoded line number information unit will be owned | |
11555 | by line_header_hash hash table. */ | |
11556 | *slot = cu->line_header; | |
4c8aa72d | 11557 | cu->line_header_die_owner = NULL; |
527f3840 JK |
11558 | } |
11559 | else | |
11560 | { | |
11561 | /* We cannot free any current entry in (*slot) as that struct line_header | |
11562 | may be already used by multiple CUs. Create only temporary decoded | |
11563 | line_header for this CU - it may happen at most once for each line | |
11564 | number information unit. And if we're not using line_header_hash | |
11565 | then this is what we want as well. */ | |
11566 | gdb_assert (die->tag != DW_TAG_partial_unit); | |
527f3840 JK |
11567 | } |
11568 | decode_mapping = (die->tag != DW_TAG_partial_unit); | |
11569 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, | |
11570 | decode_mapping); | |
fff8551c | 11571 | |
2ab95328 TT |
11572 | } |
11573 | ||
95554aad | 11574 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 11575 | |
c906108c | 11576 | static void |
e7c27a73 | 11577 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11578 | { |
518817b3 SM |
11579 | struct dwarf2_per_objfile *dwarf2_per_objfile |
11580 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 11581 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 11582 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
2acceee2 | 11583 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
11584 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
11585 | struct attribute *attr; | |
c906108c | 11586 | struct die_info *child_die; |
e142c38c | 11587 | CORE_ADDR baseaddr; |
6e70227d | 11588 | |
380618d6 | 11589 | prepare_one_comp_unit (cu, die, cu->language); |
e142c38c | 11590 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c | 11591 | |
fae299cd | 11592 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
11593 | |
11594 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
11595 | from finish_block. */ | |
2acceee2 | 11596 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c | 11597 | lowpc = highpc; |
3e29f34a | 11598 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
c906108c | 11599 | |
d721ba37 | 11600 | file_and_directory fnd = find_file_and_directory (die, cu); |
e1024ff1 | 11601 | |
f4b8a18d KW |
11602 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
11603 | standardised yet. As a workaround for the language detection we fall | |
11604 | back to the DW_AT_producer string. */ | |
11605 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
11606 | cu->language = language_opencl; | |
11607 | ||
3019eac3 DE |
11608 | /* Similar hack for Go. */ |
11609 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
11610 | set_cu_language (DW_LANG_Go, cu); | |
11611 | ||
c24bdb02 | 11612 | cu->start_symtab (fnd.name, fnd.comp_dir, lowpc); |
3019eac3 DE |
11613 | |
11614 | /* Decode line number information if present. We do this before | |
11615 | processing child DIEs, so that the line header table is available | |
11616 | for DW_AT_decl_file. */ | |
d721ba37 | 11617 | handle_DW_AT_stmt_list (die, cu, fnd.comp_dir, lowpc); |
3019eac3 DE |
11618 | |
11619 | /* Process all dies in compilation unit. */ | |
11620 | if (die->child != NULL) | |
11621 | { | |
11622 | child_die = die->child; | |
11623 | while (child_die && child_die->tag) | |
11624 | { | |
11625 | process_die (child_die, cu); | |
11626 | child_die = sibling_die (child_die); | |
11627 | } | |
11628 | } | |
11629 | ||
11630 | /* Decode macro information, if present. Dwarf 2 macro information | |
11631 | refers to information in the line number info statement program | |
11632 | header, so we can only read it if we've read the header | |
11633 | successfully. */ | |
0af92d60 JK |
11634 | attr = dwarf2_attr (die, DW_AT_macros, cu); |
11635 | if (attr == NULL) | |
11636 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
3019eac3 DE |
11637 | if (attr && cu->line_header) |
11638 | { | |
11639 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
b98664d3 | 11640 | complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info")); |
3019eac3 | 11641 | |
43f3e411 | 11642 | dwarf_decode_macros (cu, DW_UNSND (attr), 1); |
3019eac3 DE |
11643 | } |
11644 | else | |
11645 | { | |
11646 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
11647 | if (attr && cu->line_header) | |
11648 | { | |
11649 | unsigned int macro_offset = DW_UNSND (attr); | |
11650 | ||
43f3e411 | 11651 | dwarf_decode_macros (cu, macro_offset, 0); |
3019eac3 DE |
11652 | } |
11653 | } | |
3019eac3 DE |
11654 | } |
11655 | ||
c24bdb02 KS |
11656 | void |
11657 | dwarf2_cu::setup_type_unit_groups (struct die_info *die) | |
3019eac3 | 11658 | { |
f4dc4d17 DE |
11659 | struct type_unit_group *tu_group; |
11660 | int first_time; | |
3019eac3 | 11661 | struct attribute *attr; |
9c541725 | 11662 | unsigned int i; |
0186c6a7 | 11663 | struct signatured_type *sig_type; |
3019eac3 | 11664 | |
f4dc4d17 | 11665 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 11666 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 11667 | |
c24bdb02 | 11668 | attr = dwarf2_attr (die, DW_AT_stmt_list, this); |
3019eac3 | 11669 | |
f4dc4d17 | 11670 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 11671 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 | 11672 | if (sig_type->type_unit_group == NULL) |
c24bdb02 | 11673 | sig_type->type_unit_group = get_type_unit_group (this, attr); |
0186c6a7 | 11674 | tu_group = sig_type->type_unit_group; |
f4dc4d17 DE |
11675 | |
11676 | /* If we've already processed this stmt_list there's no real need to | |
11677 | do it again, we could fake it and just recreate the part we need | |
11678 | (file name,index -> symtab mapping). If data shows this optimization | |
11679 | is useful we can do it then. */ | |
43f3e411 | 11680 | first_time = tu_group->compunit_symtab == NULL; |
f4dc4d17 DE |
11681 | |
11682 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
11683 | debug info. */ | |
fff8551c | 11684 | line_header_up lh; |
f4dc4d17 | 11685 | if (attr != NULL) |
3019eac3 | 11686 | { |
9c541725 | 11687 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
c24bdb02 | 11688 | lh = dwarf_decode_line_header (line_offset, this); |
f4dc4d17 DE |
11689 | } |
11690 | if (lh == NULL) | |
11691 | { | |
11692 | if (first_time) | |
c24bdb02 | 11693 | start_symtab ("", NULL, 0); |
f4dc4d17 DE |
11694 | else |
11695 | { | |
11696 | gdb_assert (tu_group->symtabs == NULL); | |
c24bdb02 | 11697 | gdb_assert (m_builder == nullptr); |
804d2729 | 11698 | struct compunit_symtab *cust = tu_group->compunit_symtab; |
c24bdb02 KS |
11699 | m_builder.reset (new struct buildsym_compunit |
11700 | (COMPUNIT_OBJFILE (cust), "", | |
11701 | COMPUNIT_DIRNAME (cust), | |
11702 | compunit_language (cust), | |
11703 | 0, cust)); | |
f4dc4d17 | 11704 | } |
f4dc4d17 | 11705 | return; |
3019eac3 DE |
11706 | } |
11707 | ||
c24bdb02 KS |
11708 | line_header = lh.release (); |
11709 | line_header_die_owner = die; | |
3019eac3 | 11710 | |
f4dc4d17 DE |
11711 | if (first_time) |
11712 | { | |
c24bdb02 | 11713 | struct compunit_symtab *cust = start_symtab ("", NULL, 0); |
3019eac3 | 11714 | |
1fd60fc0 DE |
11715 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
11716 | still initializing it, and our caller (a few levels up) | |
11717 | process_full_type_unit still needs to know if this is the first | |
11718 | time. */ | |
11719 | ||
c24bdb02 | 11720 | tu_group->num_symtabs = line_header->file_names.size (); |
4c8aa72d | 11721 | tu_group->symtabs = XNEWVEC (struct symtab *, |
c24bdb02 | 11722 | line_header->file_names.size ()); |
3019eac3 | 11723 | |
c24bdb02 | 11724 | for (i = 0; i < line_header->file_names.size (); ++i) |
f4dc4d17 | 11725 | { |
c24bdb02 | 11726 | file_entry &fe = line_header->file_names[i]; |
3019eac3 | 11727 | |
c24bdb02 KS |
11728 | dwarf2_start_subfile (this, fe.name, |
11729 | fe.include_dir (line_header)); | |
11730 | buildsym_compunit *b = get_builder (); | |
11731 | if (b->get_current_subfile ()->symtab == NULL) | |
f4dc4d17 | 11732 | { |
4c8aa72d PA |
11733 | /* NOTE: start_subfile will recognize when it's been |
11734 | passed a file it has already seen. So we can't | |
11735 | assume there's a simple mapping from | |
11736 | cu->line_header->file_names to subfiles, plus | |
11737 | cu->line_header->file_names may contain dups. */ | |
c24bdb02 KS |
11738 | b->get_current_subfile ()->symtab |
11739 | = allocate_symtab (cust, b->get_current_subfile ()->name); | |
f4dc4d17 DE |
11740 | } |
11741 | ||
c24bdb02 | 11742 | fe.symtab = b->get_current_subfile ()->symtab; |
8c43009f | 11743 | tu_group->symtabs[i] = fe.symtab; |
f4dc4d17 DE |
11744 | } |
11745 | } | |
11746 | else | |
3019eac3 | 11747 | { |
c24bdb02 | 11748 | gdb_assert (m_builder == nullptr); |
804d2729 | 11749 | struct compunit_symtab *cust = tu_group->compunit_symtab; |
c24bdb02 KS |
11750 | m_builder.reset (new struct buildsym_compunit |
11751 | (COMPUNIT_OBJFILE (cust), "", | |
11752 | COMPUNIT_DIRNAME (cust), | |
11753 | compunit_language (cust), | |
11754 | 0, cust)); | |
f4dc4d17 | 11755 | |
c24bdb02 | 11756 | for (i = 0; i < line_header->file_names.size (); ++i) |
f4dc4d17 | 11757 | { |
c24bdb02 | 11758 | file_entry &fe = line_header->file_names[i]; |
f4dc4d17 | 11759 | |
4c8aa72d | 11760 | fe.symtab = tu_group->symtabs[i]; |
f4dc4d17 | 11761 | } |
3019eac3 DE |
11762 | } |
11763 | ||
f4dc4d17 DE |
11764 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
11765 | so they don't have a "real" (so to speak) symtab anyway. | |
11766 | There is later code that will assign the main symtab to all symbols | |
11767 | that don't have one. We need to handle the case of a symbol with a | |
11768 | missing symtab (DW_AT_decl_file) anyway. */ | |
11769 | } | |
3019eac3 | 11770 | |
f4dc4d17 DE |
11771 | /* Process DW_TAG_type_unit. |
11772 | For TUs we want to skip the first top level sibling if it's not the | |
11773 | actual type being defined by this TU. In this case the first top | |
11774 | level sibling is there to provide context only. */ | |
3019eac3 | 11775 | |
f4dc4d17 DE |
11776 | static void |
11777 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
11778 | { | |
11779 | struct die_info *child_die; | |
3019eac3 | 11780 | |
f4dc4d17 DE |
11781 | prepare_one_comp_unit (cu, die, language_minimal); |
11782 | ||
11783 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
11784 | We do this before processing child DIEs, so that the line header table | |
11785 | is available for DW_AT_decl_file. */ | |
c24bdb02 | 11786 | cu->setup_type_unit_groups (die); |
f4dc4d17 DE |
11787 | |
11788 | if (die->child != NULL) | |
11789 | { | |
11790 | child_die = die->child; | |
11791 | while (child_die && child_die->tag) | |
11792 | { | |
11793 | process_die (child_die, cu); | |
11794 | child_die = sibling_die (child_die); | |
11795 | } | |
11796 | } | |
3019eac3 DE |
11797 | } |
11798 | \f | |
80626a55 DE |
11799 | /* DWO/DWP files. |
11800 | ||
11801 | http://gcc.gnu.org/wiki/DebugFission | |
11802 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
11803 | ||
11804 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
11805 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
11806 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
11807 | |
11808 | static hashval_t | |
11809 | hash_dwo_file (const void *item) | |
11810 | { | |
9a3c8263 | 11811 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
a2ce51a0 | 11812 | hashval_t hash; |
3019eac3 | 11813 | |
a2ce51a0 DE |
11814 | hash = htab_hash_string (dwo_file->dwo_name); |
11815 | if (dwo_file->comp_dir != NULL) | |
11816 | hash += htab_hash_string (dwo_file->comp_dir); | |
11817 | return hash; | |
3019eac3 DE |
11818 | } |
11819 | ||
11820 | static int | |
11821 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
11822 | { | |
9a3c8263 SM |
11823 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
11824 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; | |
3019eac3 | 11825 | |
a2ce51a0 DE |
11826 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
11827 | return 0; | |
11828 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
11829 | return lhs->comp_dir == rhs->comp_dir; | |
11830 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
11831 | } |
11832 | ||
11833 | /* Allocate a hash table for DWO files. */ | |
11834 | ||
51ac9db5 | 11835 | static htab_up |
ed2dc618 | 11836 | allocate_dwo_file_hash_table (struct objfile *objfile) |
3019eac3 | 11837 | { |
51ac9db5 SM |
11838 | auto delete_dwo_file = [] (void *item) |
11839 | { | |
11840 | struct dwo_file *dwo_file = (struct dwo_file *) item; | |
11841 | ||
11842 | delete dwo_file; | |
11843 | }; | |
11844 | ||
11845 | return htab_up (htab_create_alloc_ex (41, | |
11846 | hash_dwo_file, | |
11847 | eq_dwo_file, | |
11848 | delete_dwo_file, | |
11849 | &objfile->objfile_obstack, | |
11850 | hashtab_obstack_allocate, | |
11851 | dummy_obstack_deallocate)); | |
3019eac3 DE |
11852 | } |
11853 | ||
80626a55 DE |
11854 | /* Lookup DWO file DWO_NAME. */ |
11855 | ||
11856 | static void ** | |
ed2dc618 SM |
11857 | lookup_dwo_file_slot (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11858 | const char *dwo_name, | |
11859 | const char *comp_dir) | |
80626a55 DE |
11860 | { |
11861 | struct dwo_file find_entry; | |
11862 | void **slot; | |
11863 | ||
11864 | if (dwarf2_per_objfile->dwo_files == NULL) | |
ed2dc618 SM |
11865 | dwarf2_per_objfile->dwo_files |
11866 | = allocate_dwo_file_hash_table (dwarf2_per_objfile->objfile); | |
80626a55 | 11867 | |
0ac5b59e DE |
11868 | find_entry.dwo_name = dwo_name; |
11869 | find_entry.comp_dir = comp_dir; | |
51ac9db5 SM |
11870 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files.get (), &find_entry, |
11871 | INSERT); | |
80626a55 DE |
11872 | |
11873 | return slot; | |
11874 | } | |
11875 | ||
3019eac3 DE |
11876 | static hashval_t |
11877 | hash_dwo_unit (const void *item) | |
11878 | { | |
9a3c8263 | 11879 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 DE |
11880 | |
11881 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
11882 | return dwo_unit->signature; | |
11883 | } | |
11884 | ||
11885 | static int | |
11886 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
11887 | { | |
9a3c8263 SM |
11888 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
11889 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; | |
3019eac3 DE |
11890 | |
11891 | /* The signature is assumed to be unique within the DWO file. | |
11892 | So while object file CU dwo_id's always have the value zero, | |
11893 | that's OK, assuming each object file DWO file has only one CU, | |
11894 | and that's the rule for now. */ | |
11895 | return lhs->signature == rhs->signature; | |
11896 | } | |
11897 | ||
11898 | /* Allocate a hash table for DWO CUs,TUs. | |
11899 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
11900 | ||
11901 | static htab_t | |
11902 | allocate_dwo_unit_table (struct objfile *objfile) | |
11903 | { | |
11904 | /* Start out with a pretty small number. | |
11905 | Generally DWO files contain only one CU and maybe some TUs. */ | |
11906 | return htab_create_alloc_ex (3, | |
11907 | hash_dwo_unit, | |
11908 | eq_dwo_unit, | |
11909 | NULL, | |
11910 | &objfile->objfile_obstack, | |
11911 | hashtab_obstack_allocate, | |
11912 | dummy_obstack_deallocate); | |
11913 | } | |
11914 | ||
80626a55 | 11915 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 | 11916 | |
19c3d4c9 | 11917 | struct create_dwo_cu_data |
3019eac3 DE |
11918 | { |
11919 | struct dwo_file *dwo_file; | |
19c3d4c9 | 11920 | struct dwo_unit dwo_unit; |
3019eac3 DE |
11921 | }; |
11922 | ||
19c3d4c9 | 11923 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
11924 | |
11925 | static void | |
19c3d4c9 DE |
11926 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
11927 | const gdb_byte *info_ptr, | |
11928 | struct die_info *comp_unit_die, | |
11929 | int has_children, | |
11930 | void *datap) | |
3019eac3 DE |
11931 | { |
11932 | struct dwarf2_cu *cu = reader->cu; | |
9c541725 | 11933 | sect_offset sect_off = cu->per_cu->sect_off; |
8a0459fd | 11934 | struct dwarf2_section_info *section = cu->per_cu->section; |
9a3c8263 | 11935 | struct create_dwo_cu_data *data = (struct create_dwo_cu_data *) datap; |
3019eac3 | 11936 | struct dwo_file *dwo_file = data->dwo_file; |
19c3d4c9 | 11937 | struct dwo_unit *dwo_unit = &data->dwo_unit; |
3019eac3 | 11938 | |
a084a2a6 AT |
11939 | gdb::optional<ULONGEST> signature = lookup_dwo_id (cu, comp_unit_die); |
11940 | if (!signature.has_value ()) | |
3019eac3 | 11941 | { |
b98664d3 | 11942 | complaint (_("Dwarf Error: debug entry at offset %s is missing" |
19c3d4c9 | 11943 | " its dwo_id [in module %s]"), |
9d8780f0 | 11944 | sect_offset_str (sect_off), dwo_file->dwo_name); |
3019eac3 DE |
11945 | return; |
11946 | } | |
11947 | ||
3019eac3 | 11948 | dwo_unit->dwo_file = dwo_file; |
a084a2a6 | 11949 | dwo_unit->signature = *signature; |
8a0459fd | 11950 | dwo_unit->section = section; |
9c541725 | 11951 | dwo_unit->sect_off = sect_off; |
3019eac3 DE |
11952 | dwo_unit->length = cu->per_cu->length; |
11953 | ||
b4f54984 | 11954 | if (dwarf_read_debug) |
9d8780f0 SM |
11955 | fprintf_unfiltered (gdb_stdlog, " offset %s, dwo_id %s\n", |
11956 | sect_offset_str (sect_off), | |
9c541725 | 11957 | hex_string (dwo_unit->signature)); |
3019eac3 DE |
11958 | } |
11959 | ||
33c5cd75 | 11960 | /* Create the dwo_units for the CUs in a DWO_FILE. |
19c3d4c9 | 11961 | Note: This function processes DWO files only, not DWP files. */ |
3019eac3 | 11962 | |
33c5cd75 | 11963 | static void |
ed2dc618 SM |
11964 | create_cus_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11965 | struct dwo_file &dwo_file, dwarf2_section_info §ion, | |
33c5cd75 | 11966 | htab_t &cus_htab) |
3019eac3 DE |
11967 | { |
11968 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
d521ce57 | 11969 | const gdb_byte *info_ptr, *end_ptr; |
3019eac3 | 11970 | |
33c5cd75 DB |
11971 | dwarf2_read_section (objfile, §ion); |
11972 | info_ptr = section.buffer; | |
3019eac3 DE |
11973 | |
11974 | if (info_ptr == NULL) | |
33c5cd75 | 11975 | return; |
3019eac3 | 11976 | |
b4f54984 | 11977 | if (dwarf_read_debug) |
19c3d4c9 DE |
11978 | { |
11979 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
33c5cd75 DB |
11980 | get_section_name (§ion), |
11981 | get_section_file_name (§ion)); | |
19c3d4c9 | 11982 | } |
3019eac3 | 11983 | |
33c5cd75 | 11984 | end_ptr = info_ptr + section.size; |
3019eac3 DE |
11985 | while (info_ptr < end_ptr) |
11986 | { | |
11987 | struct dwarf2_per_cu_data per_cu; | |
33c5cd75 DB |
11988 | struct create_dwo_cu_data create_dwo_cu_data; |
11989 | struct dwo_unit *dwo_unit; | |
11990 | void **slot; | |
11991 | sect_offset sect_off = (sect_offset) (info_ptr - section.buffer); | |
3019eac3 | 11992 | |
19c3d4c9 DE |
11993 | memset (&create_dwo_cu_data.dwo_unit, 0, |
11994 | sizeof (create_dwo_cu_data.dwo_unit)); | |
3019eac3 | 11995 | memset (&per_cu, 0, sizeof (per_cu)); |
e3b94546 | 11996 | per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
3019eac3 | 11997 | per_cu.is_debug_types = 0; |
33c5cd75 DB |
11998 | per_cu.sect_off = sect_offset (info_ptr - section.buffer); |
11999 | per_cu.section = §ion; | |
c5ed0576 | 12000 | create_dwo_cu_data.dwo_file = &dwo_file; |
33c5cd75 DB |
12001 | |
12002 | init_cutu_and_read_dies_no_follow ( | |
12003 | &per_cu, &dwo_file, create_dwo_cu_reader, &create_dwo_cu_data); | |
12004 | info_ptr += per_cu.length; | |
12005 | ||
12006 | // If the unit could not be parsed, skip it. | |
12007 | if (create_dwo_cu_data.dwo_unit.dwo_file == NULL) | |
12008 | continue; | |
3019eac3 | 12009 | |
33c5cd75 DB |
12010 | if (cus_htab == NULL) |
12011 | cus_htab = allocate_dwo_unit_table (objfile); | |
19c3d4c9 | 12012 | |
33c5cd75 DB |
12013 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); |
12014 | *dwo_unit = create_dwo_cu_data.dwo_unit; | |
12015 | slot = htab_find_slot (cus_htab, dwo_unit, INSERT); | |
12016 | gdb_assert (slot != NULL); | |
12017 | if (*slot != NULL) | |
19c3d4c9 | 12018 | { |
33c5cd75 DB |
12019 | const struct dwo_unit *dup_cu = (const struct dwo_unit *)*slot; |
12020 | sect_offset dup_sect_off = dup_cu->sect_off; | |
19c3d4c9 | 12021 | |
b98664d3 | 12022 | complaint (_("debug cu entry at offset %s is duplicate to" |
9d8780f0 SM |
12023 | " the entry at offset %s, signature %s"), |
12024 | sect_offset_str (sect_off), sect_offset_str (dup_sect_off), | |
33c5cd75 | 12025 | hex_string (dwo_unit->signature)); |
19c3d4c9 | 12026 | } |
33c5cd75 | 12027 | *slot = (void *)dwo_unit; |
3019eac3 | 12028 | } |
3019eac3 DE |
12029 | } |
12030 | ||
80626a55 DE |
12031 | /* DWP file .debug_{cu,tu}_index section format: |
12032 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
12033 | ||
d2415c6c DE |
12034 | DWP Version 1: |
12035 | ||
80626a55 DE |
12036 | Both index sections have the same format, and serve to map a 64-bit |
12037 | signature to a set of section numbers. Each section begins with a header, | |
12038 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
12039 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
12040 | aligned at 8-byte boundaries in the file. | |
12041 | ||
d2415c6c DE |
12042 | The index section header consists of: |
12043 | ||
12044 | V, 32 bit version number | |
12045 | -, 32 bits unused | |
12046 | N, 32 bit number of compilation units or type units in the index | |
12047 | M, 32 bit number of slots in the hash table | |
80626a55 | 12048 | |
d2415c6c | 12049 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 12050 | |
d2415c6c DE |
12051 | The hash table begins at offset 16 in the section, and consists of an array |
12052 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
12053 | order of the application binary). Unused slots in the hash table are 0. | |
12054 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 12055 | |
d2415c6c DE |
12056 | The parallel table begins immediately after the hash table |
12057 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
12058 | array of 32-bit indexes (using the byte order of the application binary), | |
12059 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
12060 | table contains a 32-bit index into the pool of section numbers. For unused | |
12061 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 12062 | |
73869dc2 DE |
12063 | The pool of section numbers begins immediately following the hash table |
12064 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
12065 | section numbers consists of an array of 32-bit words (using the byte order | |
12066 | of the application binary). Each item in the array is indexed starting | |
12067 | from 0. The hash table entry provides the index of the first section | |
12068 | number in the set. Additional section numbers in the set follow, and the | |
12069 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
12070 | ||
12071 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
12072 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
12073 | be the second entry. Other members of the set may follow in any order. | |
12074 | ||
12075 | --- | |
12076 | ||
12077 | DWP Version 2: | |
12078 | ||
12079 | DWP Version 2 combines all the .debug_info, etc. sections into one, | |
12080 | and the entries in the index tables are now offsets into these sections. | |
12081 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
12082 | section. | |
12083 | ||
12084 | Index Section Contents: | |
12085 | Header | |
12086 | Hash Table of Signatures dwp_hash_table.hash_table | |
12087 | Parallel Table of Indices dwp_hash_table.unit_table | |
12088 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} | |
12089 | Table of Section Sizes dwp_hash_table.v2.sizes | |
12090 | ||
12091 | The index section header consists of: | |
12092 | ||
12093 | V, 32 bit version number | |
12094 | L, 32 bit number of columns in the table of section offsets | |
12095 | N, 32 bit number of compilation units or type units in the index | |
12096 | M, 32 bit number of slots in the hash table | |
12097 | ||
12098 | Numbers are recorded using the byte order of the application binary. | |
12099 | ||
12100 | The hash table has the same format as version 1. | |
12101 | The parallel table of indices has the same format as version 1, | |
12102 | except that the entries are origin-1 indices into the table of sections | |
12103 | offsets and the table of section sizes. | |
12104 | ||
12105 | The table of offsets begins immediately following the parallel table | |
12106 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
12107 | a two-dimensional array of 32-bit words (using the byte order of the | |
12108 | application binary), with L columns and N+1 rows, in row-major order. | |
12109 | Each row in the array is indexed starting from 0. The first row provides | |
12110 | a key to the remaining rows: each column in this row provides an identifier | |
12111 | for a debug section, and the offsets in the same column of subsequent rows | |
12112 | refer to that section. The section identifiers are: | |
12113 | ||
12114 | DW_SECT_INFO 1 .debug_info.dwo | |
12115 | DW_SECT_TYPES 2 .debug_types.dwo | |
12116 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
12117 | DW_SECT_LINE 4 .debug_line.dwo | |
12118 | DW_SECT_LOC 5 .debug_loc.dwo | |
12119 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
12120 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
12121 | DW_SECT_MACRO 8 .debug_macro.dwo | |
12122 | ||
12123 | The offsets provided by the CU and TU index sections are the base offsets | |
12124 | for the contributions made by each CU or TU to the corresponding section | |
12125 | in the package file. Each CU and TU header contains an abbrev_offset | |
12126 | field, used to find the abbreviations table for that CU or TU within the | |
12127 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
12128 | be interpreted as relative to the base offset given in the index section. | |
12129 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
12130 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
12131 | and offsets into other debug sections obtained from DWARF attributes should | |
12132 | also be interpreted as relative to the corresponding base offset. | |
12133 | ||
12134 | The table of sizes begins immediately following the table of offsets. | |
12135 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
12136 | with L columns and N rows, in row-major order. Each row in the array is | |
12137 | indexed starting from 1 (row 0 is shared by the two tables). | |
12138 | ||
12139 | --- | |
12140 | ||
12141 | Hash table lookup is handled the same in version 1 and 2: | |
12142 | ||
12143 | We assume that N and M will not exceed 2^32 - 1. | |
12144 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
12145 | ||
d2415c6c DE |
12146 | Given a 64-bit compilation unit signature or a type signature S, an entry |
12147 | in the hash table is located as follows: | |
80626a55 | 12148 | |
d2415c6c DE |
12149 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
12150 | the low-order k bits all set to 1. | |
80626a55 | 12151 | |
d2415c6c | 12152 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 12153 | |
d2415c6c DE |
12154 | 3) If the hash table entry at index H matches the signature, use that |
12155 | entry. If the hash table entry at index H is unused (all zeroes), | |
12156 | terminate the search: the signature is not present in the table. | |
80626a55 | 12157 | |
d2415c6c | 12158 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 12159 | |
d2415c6c | 12160 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 12161 | to stop at an unused slot or find the match. */ |
80626a55 DE |
12162 | |
12163 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
12164 | .debug_{info,types}.dwo in DWP_FILE. | |
12165 | Returns NULL if there isn't one. | |
12166 | Note: This function processes DWP files only, not DWO files. */ | |
12167 | ||
12168 | static struct dwp_hash_table * | |
ed2dc618 SM |
12169 | create_dwp_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12170 | struct dwp_file *dwp_file, int is_debug_types) | |
80626a55 DE |
12171 | { |
12172 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
400174b1 | 12173 | bfd *dbfd = dwp_file->dbfd.get (); |
948f8e3d | 12174 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 12175 | struct dwarf2_section_info *index; |
73869dc2 | 12176 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
12177 | struct dwp_hash_table *htab; |
12178 | ||
12179 | if (is_debug_types) | |
12180 | index = &dwp_file->sections.tu_index; | |
12181 | else | |
12182 | index = &dwp_file->sections.cu_index; | |
12183 | ||
12184 | if (dwarf2_section_empty_p (index)) | |
12185 | return NULL; | |
12186 | dwarf2_read_section (objfile, index); | |
12187 | ||
12188 | index_ptr = index->buffer; | |
12189 | index_end = index_ptr + index->size; | |
12190 | ||
12191 | version = read_4_bytes (dbfd, index_ptr); | |
73869dc2 DE |
12192 | index_ptr += 4; |
12193 | if (version == 2) | |
12194 | nr_columns = read_4_bytes (dbfd, index_ptr); | |
12195 | else | |
12196 | nr_columns = 0; | |
12197 | index_ptr += 4; | |
80626a55 DE |
12198 | nr_units = read_4_bytes (dbfd, index_ptr); |
12199 | index_ptr += 4; | |
12200 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
12201 | index_ptr += 4; | |
12202 | ||
73869dc2 | 12203 | if (version != 1 && version != 2) |
80626a55 | 12204 | { |
21aa081e | 12205 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 12206 | " [in module %s]"), |
21aa081e | 12207 | pulongest (version), dwp_file->name); |
80626a55 DE |
12208 | } |
12209 | if (nr_slots != (nr_slots & -nr_slots)) | |
12210 | { | |
21aa081e | 12211 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 12212 | " is not power of 2 [in module %s]"), |
21aa081e | 12213 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
12214 | } |
12215 | ||
12216 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
73869dc2 DE |
12217 | htab->version = version; |
12218 | htab->nr_columns = nr_columns; | |
80626a55 DE |
12219 | htab->nr_units = nr_units; |
12220 | htab->nr_slots = nr_slots; | |
12221 | htab->hash_table = index_ptr; | |
12222 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
12223 | |
12224 | /* Exit early if the table is empty. */ | |
12225 | if (nr_slots == 0 || nr_units == 0 | |
12226 | || (version == 2 && nr_columns == 0)) | |
12227 | { | |
12228 | /* All must be zero. */ | |
12229 | if (nr_slots != 0 || nr_units != 0 | |
12230 | || (version == 2 && nr_columns != 0)) | |
12231 | { | |
b98664d3 | 12232 | complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not" |
73869dc2 DE |
12233 | " all zero [in modules %s]"), |
12234 | dwp_file->name); | |
12235 | } | |
12236 | return htab; | |
12237 | } | |
12238 | ||
12239 | if (version == 1) | |
12240 | { | |
12241 | htab->section_pool.v1.indices = | |
12242 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
12243 | /* It's harder to decide whether the section is too small in v1. | |
12244 | V1 is deprecated anyway so we punt. */ | |
12245 | } | |
12246 | else | |
12247 | { | |
12248 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
12249 | int *ids = htab->section_pool.v2.section_ids; | |
04fd5eed | 12250 | size_t sizeof_ids = sizeof (htab->section_pool.v2.section_ids); |
73869dc2 DE |
12251 | /* Reverse map for error checking. */ |
12252 | int ids_seen[DW_SECT_MAX + 1]; | |
12253 | int i; | |
12254 | ||
12255 | if (nr_columns < 2) | |
12256 | { | |
12257 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
12258 | " in section table [in module %s]"), | |
12259 | dwp_file->name); | |
12260 | } | |
12261 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
12262 | { | |
12263 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
12264 | " in section table [in module %s]"), | |
12265 | dwp_file->name); | |
12266 | } | |
04fd5eed GB |
12267 | memset (ids, 255, sizeof_ids); |
12268 | memset (ids_seen, 255, sizeof (ids_seen)); | |
73869dc2 DE |
12269 | for (i = 0; i < nr_columns; ++i) |
12270 | { | |
12271 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
12272 | ||
12273 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
12274 | { | |
12275 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
12276 | " in section table [in module %s]"), | |
12277 | id, dwp_file->name); | |
12278 | } | |
12279 | if (ids_seen[id] != -1) | |
12280 | { | |
12281 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
12282 | " id %d in section table [in module %s]"), | |
12283 | id, dwp_file->name); | |
12284 | } | |
12285 | ids_seen[id] = i; | |
12286 | ids[i] = id; | |
12287 | } | |
12288 | /* Must have exactly one info or types section. */ | |
12289 | if (((ids_seen[DW_SECT_INFO] != -1) | |
12290 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
12291 | != 1) | |
12292 | { | |
12293 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
12294 | " DWO info/types section [in module %s]"), | |
12295 | dwp_file->name); | |
12296 | } | |
12297 | /* Must have an abbrev section. */ | |
12298 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
12299 | { | |
12300 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
12301 | " section [in module %s]"), | |
12302 | dwp_file->name); | |
12303 | } | |
12304 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
12305 | htab->section_pool.v2.sizes = | |
12306 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
12307 | * nr_units * nr_columns); | |
12308 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
12309 | * nr_units * nr_columns)) | |
12310 | > index_end) | |
12311 | { | |
12312 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
12313 | " [in module %s]"), | |
12314 | dwp_file->name); | |
12315 | } | |
12316 | } | |
80626a55 DE |
12317 | |
12318 | return htab; | |
12319 | } | |
12320 | ||
12321 | /* Update SECTIONS with the data from SECTP. | |
12322 | ||
12323 | This function is like the other "locate" section routines that are | |
12324 | passed to bfd_map_over_sections, but in this context the sections to | |
73869dc2 | 12325 | read comes from the DWP V1 hash table, not the full ELF section table. |
80626a55 DE |
12326 | |
12327 | The result is non-zero for success, or zero if an error was found. */ | |
12328 | ||
12329 | static int | |
73869dc2 DE |
12330 | locate_v1_virtual_dwo_sections (asection *sectp, |
12331 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
12332 | { |
12333 | const struct dwop_section_names *names = &dwop_section_names; | |
12334 | ||
12335 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
12336 | { | |
12337 | /* There can be only one. */ | |
049412e3 | 12338 | if (sections->abbrev.s.section != NULL) |
80626a55 | 12339 | return 0; |
049412e3 | 12340 | sections->abbrev.s.section = sectp; |
fd361982 | 12341 | sections->abbrev.size = bfd_section_size (sectp); |
80626a55 DE |
12342 | } |
12343 | else if (section_is_p (sectp->name, &names->info_dwo) | |
12344 | || section_is_p (sectp->name, &names->types_dwo)) | |
12345 | { | |
12346 | /* There can be only one. */ | |
049412e3 | 12347 | if (sections->info_or_types.s.section != NULL) |
80626a55 | 12348 | return 0; |
049412e3 | 12349 | sections->info_or_types.s.section = sectp; |
fd361982 | 12350 | sections->info_or_types.size = bfd_section_size (sectp); |
80626a55 DE |
12351 | } |
12352 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
12353 | { | |
12354 | /* There can be only one. */ | |
049412e3 | 12355 | if (sections->line.s.section != NULL) |
80626a55 | 12356 | return 0; |
049412e3 | 12357 | sections->line.s.section = sectp; |
fd361982 | 12358 | sections->line.size = bfd_section_size (sectp); |
80626a55 DE |
12359 | } |
12360 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
12361 | { | |
12362 | /* There can be only one. */ | |
049412e3 | 12363 | if (sections->loc.s.section != NULL) |
80626a55 | 12364 | return 0; |
049412e3 | 12365 | sections->loc.s.section = sectp; |
fd361982 | 12366 | sections->loc.size = bfd_section_size (sectp); |
80626a55 DE |
12367 | } |
12368 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
12369 | { | |
12370 | /* There can be only one. */ | |
049412e3 | 12371 | if (sections->macinfo.s.section != NULL) |
80626a55 | 12372 | return 0; |
049412e3 | 12373 | sections->macinfo.s.section = sectp; |
fd361982 | 12374 | sections->macinfo.size = bfd_section_size (sectp); |
80626a55 DE |
12375 | } |
12376 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
12377 | { | |
12378 | /* There can be only one. */ | |
049412e3 | 12379 | if (sections->macro.s.section != NULL) |
80626a55 | 12380 | return 0; |
049412e3 | 12381 | sections->macro.s.section = sectp; |
fd361982 | 12382 | sections->macro.size = bfd_section_size (sectp); |
80626a55 DE |
12383 | } |
12384 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
12385 | { | |
12386 | /* There can be only one. */ | |
049412e3 | 12387 | if (sections->str_offsets.s.section != NULL) |
80626a55 | 12388 | return 0; |
049412e3 | 12389 | sections->str_offsets.s.section = sectp; |
fd361982 | 12390 | sections->str_offsets.size = bfd_section_size (sectp); |
80626a55 DE |
12391 | } |
12392 | else | |
12393 | { | |
12394 | /* No other kind of section is valid. */ | |
12395 | return 0; | |
12396 | } | |
12397 | ||
12398 | return 1; | |
12399 | } | |
12400 | ||
73869dc2 DE |
12401 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
12402 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
12403 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
12404 | This is for DWP version 1 files. */ | |
80626a55 DE |
12405 | |
12406 | static struct dwo_unit * | |
ed2dc618 SM |
12407 | create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12408 | struct dwp_file *dwp_file, | |
73869dc2 DE |
12409 | uint32_t unit_index, |
12410 | const char *comp_dir, | |
12411 | ULONGEST signature, int is_debug_types) | |
80626a55 DE |
12412 | { |
12413 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
73869dc2 DE |
12414 | const struct dwp_hash_table *dwp_htab = |
12415 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 12416 | bfd *dbfd = dwp_file->dbfd.get (); |
80626a55 DE |
12417 | const char *kind = is_debug_types ? "TU" : "CU"; |
12418 | struct dwo_file *dwo_file; | |
12419 | struct dwo_unit *dwo_unit; | |
73869dc2 | 12420 | struct virtual_v1_dwo_sections sections; |
80626a55 | 12421 | void **dwo_file_slot; |
80626a55 DE |
12422 | int i; |
12423 | ||
73869dc2 DE |
12424 | gdb_assert (dwp_file->version == 1); |
12425 | ||
b4f54984 | 12426 | if (dwarf_read_debug) |
80626a55 | 12427 | { |
73869dc2 | 12428 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
80626a55 | 12429 | kind, |
73869dc2 | 12430 | pulongest (unit_index), hex_string (signature), |
80626a55 DE |
12431 | dwp_file->name); |
12432 | } | |
12433 | ||
19ac8c2e | 12434 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
12435 | Put a limit on the number of sections we look for so that bad data |
12436 | doesn't cause us to loop forever. */ | |
12437 | ||
73869dc2 | 12438 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
12439 | (1 /* .debug_info or .debug_types */ \ |
12440 | + 1 /* .debug_abbrev */ \ | |
12441 | + 1 /* .debug_line */ \ | |
12442 | + 1 /* .debug_loc */ \ | |
12443 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 12444 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
12445 | + 1 /* trailing zero */) |
12446 | ||
12447 | memset (§ions, 0, sizeof (sections)); | |
80626a55 | 12448 | |
73869dc2 | 12449 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
12450 | { |
12451 | asection *sectp; | |
12452 | uint32_t section_nr = | |
12453 | read_4_bytes (dbfd, | |
73869dc2 DE |
12454 | dwp_htab->section_pool.v1.indices |
12455 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
12456 | |
12457 | if (section_nr == 0) | |
12458 | break; | |
12459 | if (section_nr >= dwp_file->num_sections) | |
12460 | { | |
12461 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
12462 | " [in module %s]"), | |
12463 | dwp_file->name); | |
12464 | } | |
12465 | ||
12466 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 12467 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
12468 | { |
12469 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
12470 | " [in module %s]"), | |
12471 | dwp_file->name); | |
12472 | } | |
12473 | } | |
12474 | ||
12475 | if (i < 2 | |
a32a8923 DE |
12476 | || dwarf2_section_empty_p (§ions.info_or_types) |
12477 | || dwarf2_section_empty_p (§ions.abbrev)) | |
80626a55 DE |
12478 | { |
12479 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
12480 | " [in module %s]"), | |
12481 | dwp_file->name); | |
12482 | } | |
73869dc2 | 12483 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
12484 | { |
12485 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
12486 | " [in module %s]"), | |
12487 | dwp_file->name); | |
12488 | } | |
12489 | ||
12490 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
12491 | have dwo_unit "live" in that. At least for now. | |
12492 | ||
12493 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 12494 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
12495 | file, we can combine them back into a virtual DWO file to save space |
12496 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
12497 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
12498 | ||
791afaa2 TT |
12499 | std::string virtual_dwo_name = |
12500 | string_printf ("virtual-dwo/%d-%d-%d-%d", | |
12501 | get_section_id (§ions.abbrev), | |
12502 | get_section_id (§ions.line), | |
12503 | get_section_id (§ions.loc), | |
12504 | get_section_id (§ions.str_offsets)); | |
80626a55 | 12505 | /* Can we use an existing virtual DWO file? */ |
ed2dc618 SM |
12506 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
12507 | virtual_dwo_name.c_str (), | |
12508 | comp_dir); | |
80626a55 DE |
12509 | /* Create one if necessary. */ |
12510 | if (*dwo_file_slot == NULL) | |
12511 | { | |
b4f54984 | 12512 | if (dwarf_read_debug) |
80626a55 DE |
12513 | { |
12514 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 12515 | virtual_dwo_name.c_str ()); |
80626a55 | 12516 | } |
51ac9db5 | 12517 | dwo_file = new struct dwo_file; |
efba19b0 TT |
12518 | dwo_file->dwo_name = obstack_strdup (&objfile->objfile_obstack, |
12519 | virtual_dwo_name); | |
0ac5b59e | 12520 | dwo_file->comp_dir = comp_dir; |
80626a55 DE |
12521 | dwo_file->sections.abbrev = sections.abbrev; |
12522 | dwo_file->sections.line = sections.line; | |
12523 | dwo_file->sections.loc = sections.loc; | |
12524 | dwo_file->sections.macinfo = sections.macinfo; | |
12525 | dwo_file->sections.macro = sections.macro; | |
12526 | dwo_file->sections.str_offsets = sections.str_offsets; | |
12527 | /* The "str" section is global to the entire DWP file. */ | |
12528 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 12529 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
12530 | there's no need to record it in dwo_file. |
12531 | Also, we can't simply record type sections in dwo_file because | |
12532 | we record a pointer into the vector in dwo_unit. As we collect more | |
12533 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
12534 | for it, invalidating all copies of pointers into the previous |
12535 | contents. */ | |
80626a55 DE |
12536 | *dwo_file_slot = dwo_file; |
12537 | } | |
12538 | else | |
12539 | { | |
b4f54984 | 12540 | if (dwarf_read_debug) |
80626a55 DE |
12541 | { |
12542 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 12543 | virtual_dwo_name.c_str ()); |
80626a55 | 12544 | } |
9a3c8263 | 12545 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
80626a55 | 12546 | } |
80626a55 DE |
12547 | |
12548 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
12549 | dwo_unit->dwo_file = dwo_file; | |
12550 | dwo_unit->signature = signature; | |
8d749320 SM |
12551 | dwo_unit->section = |
12552 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
8a0459fd | 12553 | *dwo_unit->section = sections.info_or_types; |
57d63ce2 | 12554 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
12555 | |
12556 | return dwo_unit; | |
12557 | } | |
12558 | ||
73869dc2 DE |
12559 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
12560 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the | |
12561 | piece within that section used by a TU/CU, return a virtual section | |
12562 | of just that piece. */ | |
12563 | ||
12564 | static struct dwarf2_section_info | |
ed2dc618 SM |
12565 | create_dwp_v2_section (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12566 | struct dwarf2_section_info *section, | |
73869dc2 DE |
12567 | bfd_size_type offset, bfd_size_type size) |
12568 | { | |
12569 | struct dwarf2_section_info result; | |
12570 | asection *sectp; | |
12571 | ||
12572 | gdb_assert (section != NULL); | |
12573 | gdb_assert (!section->is_virtual); | |
12574 | ||
12575 | memset (&result, 0, sizeof (result)); | |
12576 | result.s.containing_section = section; | |
dc4ccb6f | 12577 | result.is_virtual = true; |
73869dc2 DE |
12578 | |
12579 | if (size == 0) | |
12580 | return result; | |
12581 | ||
12582 | sectp = get_section_bfd_section (section); | |
12583 | ||
12584 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
12585 | bounds of the real section. This is a pretty-rare event, so just | |
12586 | flag an error (easier) instead of a warning and trying to cope. */ | |
12587 | if (sectp == NULL | |
fd361982 | 12588 | || offset + size > bfd_section_size (sectp)) |
73869dc2 | 12589 | { |
73869dc2 DE |
12590 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" |
12591 | " in section %s [in module %s]"), | |
fd361982 | 12592 | sectp ? bfd_section_name (sectp) : "<unknown>", |
73869dc2 DE |
12593 | objfile_name (dwarf2_per_objfile->objfile)); |
12594 | } | |
12595 | ||
12596 | result.virtual_offset = offset; | |
12597 | result.size = size; | |
12598 | return result; | |
12599 | } | |
12600 | ||
12601 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
12602 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
12603 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
12604 | This is for DWP version 2 files. */ | |
12605 | ||
12606 | static struct dwo_unit * | |
ed2dc618 SM |
12607 | create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12608 | struct dwp_file *dwp_file, | |
73869dc2 DE |
12609 | uint32_t unit_index, |
12610 | const char *comp_dir, | |
12611 | ULONGEST signature, int is_debug_types) | |
12612 | { | |
12613 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
12614 | const struct dwp_hash_table *dwp_htab = | |
12615 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 12616 | bfd *dbfd = dwp_file->dbfd.get (); |
73869dc2 DE |
12617 | const char *kind = is_debug_types ? "TU" : "CU"; |
12618 | struct dwo_file *dwo_file; | |
12619 | struct dwo_unit *dwo_unit; | |
12620 | struct virtual_v2_dwo_sections sections; | |
12621 | void **dwo_file_slot; | |
73869dc2 DE |
12622 | int i; |
12623 | ||
12624 | gdb_assert (dwp_file->version == 2); | |
12625 | ||
b4f54984 | 12626 | if (dwarf_read_debug) |
73869dc2 DE |
12627 | { |
12628 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", | |
12629 | kind, | |
12630 | pulongest (unit_index), hex_string (signature), | |
12631 | dwp_file->name); | |
12632 | } | |
12633 | ||
12634 | /* Fetch the section offsets of this DWO unit. */ | |
12635 | ||
12636 | memset (§ions, 0, sizeof (sections)); | |
73869dc2 DE |
12637 | |
12638 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
12639 | { | |
12640 | uint32_t offset = read_4_bytes (dbfd, | |
12641 | dwp_htab->section_pool.v2.offsets | |
12642 | + (((unit_index - 1) * dwp_htab->nr_columns | |
12643 | + i) | |
12644 | * sizeof (uint32_t))); | |
12645 | uint32_t size = read_4_bytes (dbfd, | |
12646 | dwp_htab->section_pool.v2.sizes | |
12647 | + (((unit_index - 1) * dwp_htab->nr_columns | |
12648 | + i) | |
12649 | * sizeof (uint32_t))); | |
12650 | ||
12651 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
12652 | { | |
12653 | case DW_SECT_INFO: | |
12654 | case DW_SECT_TYPES: | |
12655 | sections.info_or_types_offset = offset; | |
12656 | sections.info_or_types_size = size; | |
12657 | break; | |
12658 | case DW_SECT_ABBREV: | |
12659 | sections.abbrev_offset = offset; | |
12660 | sections.abbrev_size = size; | |
12661 | break; | |
12662 | case DW_SECT_LINE: | |
12663 | sections.line_offset = offset; | |
12664 | sections.line_size = size; | |
12665 | break; | |
12666 | case DW_SECT_LOC: | |
12667 | sections.loc_offset = offset; | |
12668 | sections.loc_size = size; | |
12669 | break; | |
12670 | case DW_SECT_STR_OFFSETS: | |
12671 | sections.str_offsets_offset = offset; | |
12672 | sections.str_offsets_size = size; | |
12673 | break; | |
12674 | case DW_SECT_MACINFO: | |
12675 | sections.macinfo_offset = offset; | |
12676 | sections.macinfo_size = size; | |
12677 | break; | |
12678 | case DW_SECT_MACRO: | |
12679 | sections.macro_offset = offset; | |
12680 | sections.macro_size = size; | |
12681 | break; | |
12682 | } | |
12683 | } | |
12684 | ||
12685 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
12686 | have dwo_unit "live" in that. At least for now. | |
12687 | ||
12688 | The DWP file can be made up of a random collection of CUs and TUs. | |
12689 | However, for each CU + set of TUs that came from the same original DWO | |
12690 | file, we can combine them back into a virtual DWO file to save space | |
12691 | (fewer struct dwo_file objects to allocate). Remember that for really | |
12692 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
12693 | ||
791afaa2 TT |
12694 | std::string virtual_dwo_name = |
12695 | string_printf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
12696 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
12697 | (long) (sections.line_size ? sections.line_offset : 0), | |
12698 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
12699 | (long) (sections.str_offsets_size | |
12700 | ? sections.str_offsets_offset : 0)); | |
73869dc2 | 12701 | /* Can we use an existing virtual DWO file? */ |
ed2dc618 SM |
12702 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
12703 | virtual_dwo_name.c_str (), | |
12704 | comp_dir); | |
73869dc2 DE |
12705 | /* Create one if necessary. */ |
12706 | if (*dwo_file_slot == NULL) | |
12707 | { | |
b4f54984 | 12708 | if (dwarf_read_debug) |
73869dc2 DE |
12709 | { |
12710 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 12711 | virtual_dwo_name.c_str ()); |
73869dc2 | 12712 | } |
51ac9db5 | 12713 | dwo_file = new struct dwo_file; |
efba19b0 TT |
12714 | dwo_file->dwo_name = obstack_strdup (&objfile->objfile_obstack, |
12715 | virtual_dwo_name); | |
73869dc2 DE |
12716 | dwo_file->comp_dir = comp_dir; |
12717 | dwo_file->sections.abbrev = | |
ed2dc618 | 12718 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.abbrev, |
73869dc2 DE |
12719 | sections.abbrev_offset, sections.abbrev_size); |
12720 | dwo_file->sections.line = | |
ed2dc618 | 12721 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.line, |
73869dc2 DE |
12722 | sections.line_offset, sections.line_size); |
12723 | dwo_file->sections.loc = | |
ed2dc618 | 12724 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.loc, |
73869dc2 DE |
12725 | sections.loc_offset, sections.loc_size); |
12726 | dwo_file->sections.macinfo = | |
ed2dc618 | 12727 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.macinfo, |
73869dc2 DE |
12728 | sections.macinfo_offset, sections.macinfo_size); |
12729 | dwo_file->sections.macro = | |
ed2dc618 | 12730 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.macro, |
73869dc2 DE |
12731 | sections.macro_offset, sections.macro_size); |
12732 | dwo_file->sections.str_offsets = | |
ed2dc618 SM |
12733 | create_dwp_v2_section (dwarf2_per_objfile, |
12734 | &dwp_file->sections.str_offsets, | |
73869dc2 DE |
12735 | sections.str_offsets_offset, |
12736 | sections.str_offsets_size); | |
12737 | /* The "str" section is global to the entire DWP file. */ | |
12738 | dwo_file->sections.str = dwp_file->sections.str; | |
12739 | /* The info or types section is assigned below to dwo_unit, | |
12740 | there's no need to record it in dwo_file. | |
12741 | Also, we can't simply record type sections in dwo_file because | |
12742 | we record a pointer into the vector in dwo_unit. As we collect more | |
12743 | types we'll grow the vector and eventually have to reallocate space | |
12744 | for it, invalidating all copies of pointers into the previous | |
12745 | contents. */ | |
12746 | *dwo_file_slot = dwo_file; | |
12747 | } | |
12748 | else | |
12749 | { | |
b4f54984 | 12750 | if (dwarf_read_debug) |
73869dc2 DE |
12751 | { |
12752 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 12753 | virtual_dwo_name.c_str ()); |
73869dc2 | 12754 | } |
9a3c8263 | 12755 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
73869dc2 | 12756 | } |
73869dc2 DE |
12757 | |
12758 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
12759 | dwo_unit->dwo_file = dwo_file; | |
12760 | dwo_unit->signature = signature; | |
8d749320 SM |
12761 | dwo_unit->section = |
12762 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
ed2dc618 SM |
12763 | *dwo_unit->section = create_dwp_v2_section (dwarf2_per_objfile, |
12764 | is_debug_types | |
73869dc2 DE |
12765 | ? &dwp_file->sections.types |
12766 | : &dwp_file->sections.info, | |
12767 | sections.info_or_types_offset, | |
12768 | sections.info_or_types_size); | |
12769 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
12770 | ||
12771 | return dwo_unit; | |
12772 | } | |
12773 | ||
57d63ce2 DE |
12774 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
12775 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
12776 | |
12777 | static struct dwo_unit * | |
ed2dc618 SM |
12778 | lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12779 | struct dwp_file *dwp_file, const char *comp_dir, | |
57d63ce2 | 12780 | ULONGEST signature, int is_debug_types) |
80626a55 | 12781 | { |
57d63ce2 DE |
12782 | const struct dwp_hash_table *dwp_htab = |
12783 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 12784 | bfd *dbfd = dwp_file->dbfd.get (); |
57d63ce2 | 12785 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
12786 | uint32_t hash = signature & mask; |
12787 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
12788 | unsigned int i; | |
12789 | void **slot; | |
870f88f7 | 12790 | struct dwo_unit find_dwo_cu; |
80626a55 DE |
12791 | |
12792 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
12793 | find_dwo_cu.signature = signature; | |
19ac8c2e DE |
12794 | slot = htab_find_slot (is_debug_types |
12795 | ? dwp_file->loaded_tus | |
12796 | : dwp_file->loaded_cus, | |
12797 | &find_dwo_cu, INSERT); | |
80626a55 DE |
12798 | |
12799 | if (*slot != NULL) | |
9a3c8263 | 12800 | return (struct dwo_unit *) *slot; |
80626a55 DE |
12801 | |
12802 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 12803 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
12804 | { |
12805 | ULONGEST signature_in_table; | |
12806 | ||
12807 | signature_in_table = | |
57d63ce2 | 12808 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
12809 | if (signature_in_table == signature) |
12810 | { | |
57d63ce2 DE |
12811 | uint32_t unit_index = |
12812 | read_4_bytes (dbfd, | |
12813 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 12814 | |
73869dc2 DE |
12815 | if (dwp_file->version == 1) |
12816 | { | |
ed2dc618 SM |
12817 | *slot = create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile, |
12818 | dwp_file, unit_index, | |
73869dc2 DE |
12819 | comp_dir, signature, |
12820 | is_debug_types); | |
12821 | } | |
12822 | else | |
12823 | { | |
ed2dc618 SM |
12824 | *slot = create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile, |
12825 | dwp_file, unit_index, | |
73869dc2 DE |
12826 | comp_dir, signature, |
12827 | is_debug_types); | |
12828 | } | |
9a3c8263 | 12829 | return (struct dwo_unit *) *slot; |
80626a55 DE |
12830 | } |
12831 | if (signature_in_table == 0) | |
12832 | return NULL; | |
12833 | hash = (hash + hash2) & mask; | |
12834 | } | |
12835 | ||
12836 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
12837 | " [in module %s]"), | |
12838 | dwp_file->name); | |
12839 | } | |
12840 | ||
ab5088bf | 12841 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
12842 | Open the file specified by FILE_NAME and hand it off to BFD for |
12843 | preliminary analysis. Return a newly initialized bfd *, which | |
12844 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 12845 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
12846 | SEARCH_CWD is true if the current directory is to be searched. |
12847 | It will be searched before debug-file-directory. | |
13aaf454 DE |
12848 | If successful, the file is added to the bfd include table of the |
12849 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 12850 | If unable to find/open the file, return NULL. |
3019eac3 DE |
12851 | NOTE: This function is derived from symfile_bfd_open. */ |
12852 | ||
192b62ce | 12853 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
12854 | try_open_dwop_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12855 | const char *file_name, int is_dwp, int search_cwd) | |
3019eac3 | 12856 | { |
24b9144d | 12857 | int desc; |
9c02c129 DE |
12858 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
12859 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
12860 | to debug_file_directory. */ | |
e0cc99a6 | 12861 | const char *search_path; |
9c02c129 DE |
12862 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; |
12863 | ||
e0cc99a6 | 12864 | gdb::unique_xmalloc_ptr<char> search_path_holder; |
6ac97d4c DE |
12865 | if (search_cwd) |
12866 | { | |
12867 | if (*debug_file_directory != '\0') | |
e0cc99a6 TT |
12868 | { |
12869 | search_path_holder.reset (concat (".", dirname_separator_string, | |
12870 | debug_file_directory, | |
12871 | (char *) NULL)); | |
12872 | search_path = search_path_holder.get (); | |
12873 | } | |
6ac97d4c | 12874 | else |
e0cc99a6 | 12875 | search_path = "."; |
6ac97d4c | 12876 | } |
9c02c129 | 12877 | else |
e0cc99a6 | 12878 | search_path = debug_file_directory; |
3019eac3 | 12879 | |
24b9144d | 12880 | openp_flags flags = OPF_RETURN_REALPATH; |
80626a55 DE |
12881 | if (is_dwp) |
12882 | flags |= OPF_SEARCH_IN_PATH; | |
e0cc99a6 TT |
12883 | |
12884 | gdb::unique_xmalloc_ptr<char> absolute_name; | |
9c02c129 | 12885 | desc = openp (search_path, flags, file_name, |
3019eac3 DE |
12886 | O_RDONLY | O_BINARY, &absolute_name); |
12887 | if (desc < 0) | |
12888 | return NULL; | |
12889 | ||
e0cc99a6 TT |
12890 | gdb_bfd_ref_ptr sym_bfd (gdb_bfd_open (absolute_name.get (), |
12891 | gnutarget, desc)); | |
9c02c129 DE |
12892 | if (sym_bfd == NULL) |
12893 | return NULL; | |
192b62ce | 12894 | bfd_set_cacheable (sym_bfd.get (), 1); |
3019eac3 | 12895 | |
192b62ce TT |
12896 | if (!bfd_check_format (sym_bfd.get (), bfd_object)) |
12897 | return NULL; | |
3019eac3 | 12898 | |
13aaf454 DE |
12899 | /* Success. Record the bfd as having been included by the objfile's bfd. |
12900 | This is important because things like demangled_names_hash lives in the | |
12901 | objfile's per_bfd space and may have references to things like symbol | |
12902 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
192b62ce | 12903 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd.get ()); |
13aaf454 | 12904 | |
3019eac3 DE |
12905 | return sym_bfd; |
12906 | } | |
12907 | ||
ab5088bf | 12908 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
12909 | COMP_DIR is the DW_AT_comp_dir attribute. |
12910 | The result is the bfd handle of the file. | |
12911 | If there is a problem finding or opening the file, return NULL. | |
12912 | Upon success, the canonicalized path of the file is stored in the bfd, | |
12913 | same as symfile_bfd_open. */ | |
12914 | ||
192b62ce | 12915 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
12916 | open_dwo_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12917 | const char *file_name, const char *comp_dir) | |
3019eac3 | 12918 | { |
80626a55 | 12919 | if (IS_ABSOLUTE_PATH (file_name)) |
ed2dc618 SM |
12920 | return try_open_dwop_file (dwarf2_per_objfile, file_name, |
12921 | 0 /*is_dwp*/, 0 /*search_cwd*/); | |
3019eac3 DE |
12922 | |
12923 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
12924 | ||
12925 | if (comp_dir != NULL) | |
12926 | { | |
b36cec19 PA |
12927 | char *path_to_try = concat (comp_dir, SLASH_STRING, |
12928 | file_name, (char *) NULL); | |
3019eac3 DE |
12929 | |
12930 | /* NOTE: If comp_dir is a relative path, this will also try the | |
12931 | search path, which seems useful. */ | |
ed2dc618 SM |
12932 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (dwarf2_per_objfile, |
12933 | path_to_try, | |
12934 | 0 /*is_dwp*/, | |
192b62ce | 12935 | 1 /*search_cwd*/)); |
3019eac3 DE |
12936 | xfree (path_to_try); |
12937 | if (abfd != NULL) | |
12938 | return abfd; | |
12939 | } | |
12940 | ||
12941 | /* That didn't work, try debug-file-directory, which, despite its name, | |
12942 | is a list of paths. */ | |
12943 | ||
12944 | if (*debug_file_directory == '\0') | |
12945 | return NULL; | |
12946 | ||
ed2dc618 SM |
12947 | return try_open_dwop_file (dwarf2_per_objfile, file_name, |
12948 | 0 /*is_dwp*/, 1 /*search_cwd*/); | |
3019eac3 DE |
12949 | } |
12950 | ||
80626a55 DE |
12951 | /* This function is mapped across the sections and remembers the offset and |
12952 | size of each of the DWO debugging sections we are interested in. */ | |
12953 | ||
12954 | static void | |
12955 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
12956 | { | |
9a3c8263 | 12957 | struct dwo_sections *dwo_sections = (struct dwo_sections *) dwo_sections_ptr; |
80626a55 DE |
12958 | const struct dwop_section_names *names = &dwop_section_names; |
12959 | ||
12960 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
12961 | { | |
049412e3 | 12962 | dwo_sections->abbrev.s.section = sectp; |
fd361982 | 12963 | dwo_sections->abbrev.size = bfd_section_size (sectp); |
80626a55 DE |
12964 | } |
12965 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
12966 | { | |
049412e3 | 12967 | dwo_sections->info.s.section = sectp; |
fd361982 | 12968 | dwo_sections->info.size = bfd_section_size (sectp); |
80626a55 DE |
12969 | } |
12970 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
12971 | { | |
049412e3 | 12972 | dwo_sections->line.s.section = sectp; |
fd361982 | 12973 | dwo_sections->line.size = bfd_section_size (sectp); |
80626a55 DE |
12974 | } |
12975 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
12976 | { | |
049412e3 | 12977 | dwo_sections->loc.s.section = sectp; |
fd361982 | 12978 | dwo_sections->loc.size = bfd_section_size (sectp); |
80626a55 DE |
12979 | } |
12980 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
12981 | { | |
049412e3 | 12982 | dwo_sections->macinfo.s.section = sectp; |
fd361982 | 12983 | dwo_sections->macinfo.size = bfd_section_size (sectp); |
80626a55 DE |
12984 | } |
12985 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
12986 | { | |
049412e3 | 12987 | dwo_sections->macro.s.section = sectp; |
fd361982 | 12988 | dwo_sections->macro.size = bfd_section_size (sectp); |
80626a55 DE |
12989 | } |
12990 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
12991 | { | |
049412e3 | 12992 | dwo_sections->str.s.section = sectp; |
fd361982 | 12993 | dwo_sections->str.size = bfd_section_size (sectp); |
80626a55 DE |
12994 | } |
12995 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
12996 | { | |
049412e3 | 12997 | dwo_sections->str_offsets.s.section = sectp; |
fd361982 | 12998 | dwo_sections->str_offsets.size = bfd_section_size (sectp); |
80626a55 DE |
12999 | } |
13000 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
13001 | { | |
13002 | struct dwarf2_section_info type_section; | |
13003 | ||
13004 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 13005 | type_section.s.section = sectp; |
fd361982 | 13006 | type_section.size = bfd_section_size (sectp); |
fd5866f6 | 13007 | dwo_sections->types.push_back (type_section); |
80626a55 DE |
13008 | } |
13009 | } | |
13010 | ||
ab5088bf | 13011 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 13012 | by PER_CU. This is for the non-DWP case. |
80626a55 | 13013 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
13014 | |
13015 | static struct dwo_file * | |
0ac5b59e DE |
13016 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
13017 | const char *dwo_name, const char *comp_dir) | |
3019eac3 | 13018 | { |
ed2dc618 | 13019 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
3019eac3 | 13020 | |
fb1eb2f9 | 13021 | gdb_bfd_ref_ptr dbfd = open_dwo_file (dwarf2_per_objfile, dwo_name, comp_dir); |
80626a55 DE |
13022 | if (dbfd == NULL) |
13023 | { | |
b4f54984 | 13024 | if (dwarf_read_debug) |
80626a55 DE |
13025 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); |
13026 | return NULL; | |
13027 | } | |
263db9a1 | 13028 | |
51ac9db5 | 13029 | dwo_file_up dwo_file (new struct dwo_file); |
0ac5b59e DE |
13030 | dwo_file->dwo_name = dwo_name; |
13031 | dwo_file->comp_dir = comp_dir; | |
fb1eb2f9 | 13032 | dwo_file->dbfd = std::move (dbfd); |
3019eac3 | 13033 | |
fb1eb2f9 | 13034 | bfd_map_over_sections (dwo_file->dbfd.get (), dwarf2_locate_dwo_sections, |
192b62ce | 13035 | &dwo_file->sections); |
3019eac3 | 13036 | |
ed2dc618 SM |
13037 | create_cus_hash_table (dwarf2_per_objfile, *dwo_file, dwo_file->sections.info, |
13038 | dwo_file->cus); | |
3019eac3 | 13039 | |
263db9a1 | 13040 | create_debug_types_hash_table (dwarf2_per_objfile, dwo_file.get (), |
ed2dc618 | 13041 | dwo_file->sections.types, dwo_file->tus); |
3019eac3 | 13042 | |
b4f54984 | 13043 | if (dwarf_read_debug) |
80626a55 DE |
13044 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); |
13045 | ||
263db9a1 | 13046 | return dwo_file.release (); |
3019eac3 DE |
13047 | } |
13048 | ||
80626a55 | 13049 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
13050 | size of each of the DWP debugging sections common to version 1 and 2 that |
13051 | we are interested in. */ | |
3019eac3 | 13052 | |
80626a55 | 13053 | static void |
73869dc2 DE |
13054 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
13055 | void *dwp_file_ptr) | |
3019eac3 | 13056 | { |
9a3c8263 | 13057 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
80626a55 DE |
13058 | const struct dwop_section_names *names = &dwop_section_names; |
13059 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 13060 | |
80626a55 | 13061 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 13062 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
13063 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
13064 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 13065 | |
80626a55 DE |
13066 | /* Look for specific sections that we need. */ |
13067 | if (section_is_p (sectp->name, &names->str_dwo)) | |
13068 | { | |
049412e3 | 13069 | dwp_file->sections.str.s.section = sectp; |
fd361982 | 13070 | dwp_file->sections.str.size = bfd_section_size (sectp); |
80626a55 DE |
13071 | } |
13072 | else if (section_is_p (sectp->name, &names->cu_index)) | |
13073 | { | |
049412e3 | 13074 | dwp_file->sections.cu_index.s.section = sectp; |
fd361982 | 13075 | dwp_file->sections.cu_index.size = bfd_section_size (sectp); |
80626a55 DE |
13076 | } |
13077 | else if (section_is_p (sectp->name, &names->tu_index)) | |
13078 | { | |
049412e3 | 13079 | dwp_file->sections.tu_index.s.section = sectp; |
fd361982 | 13080 | dwp_file->sections.tu_index.size = bfd_section_size (sectp); |
80626a55 DE |
13081 | } |
13082 | } | |
3019eac3 | 13083 | |
73869dc2 DE |
13084 | /* This function is mapped across the sections and remembers the offset and |
13085 | size of each of the DWP version 2 debugging sections that we are interested | |
13086 | in. This is split into a separate function because we don't know if we | |
13087 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ | |
13088 | ||
13089 | static void | |
13090 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
13091 | { | |
9a3c8263 | 13092 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
73869dc2 DE |
13093 | const struct dwop_section_names *names = &dwop_section_names; |
13094 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
13095 | ||
13096 | /* Record the ELF section number for later lookup: this is what the | |
13097 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
13098 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
13099 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
13100 | ||
13101 | /* Look for specific sections that we need. */ | |
13102 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
13103 | { | |
049412e3 | 13104 | dwp_file->sections.abbrev.s.section = sectp; |
fd361982 | 13105 | dwp_file->sections.abbrev.size = bfd_section_size (sectp); |
73869dc2 DE |
13106 | } |
13107 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
13108 | { | |
049412e3 | 13109 | dwp_file->sections.info.s.section = sectp; |
fd361982 | 13110 | dwp_file->sections.info.size = bfd_section_size (sectp); |
73869dc2 DE |
13111 | } |
13112 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
13113 | { | |
049412e3 | 13114 | dwp_file->sections.line.s.section = sectp; |
fd361982 | 13115 | dwp_file->sections.line.size = bfd_section_size (sectp); |
73869dc2 DE |
13116 | } |
13117 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
13118 | { | |
049412e3 | 13119 | dwp_file->sections.loc.s.section = sectp; |
fd361982 | 13120 | dwp_file->sections.loc.size = bfd_section_size (sectp); |
73869dc2 DE |
13121 | } |
13122 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
13123 | { | |
049412e3 | 13124 | dwp_file->sections.macinfo.s.section = sectp; |
fd361982 | 13125 | dwp_file->sections.macinfo.size = bfd_section_size (sectp); |
73869dc2 DE |
13126 | } |
13127 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
13128 | { | |
049412e3 | 13129 | dwp_file->sections.macro.s.section = sectp; |
fd361982 | 13130 | dwp_file->sections.macro.size = bfd_section_size (sectp); |
73869dc2 DE |
13131 | } |
13132 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
13133 | { | |
049412e3 | 13134 | dwp_file->sections.str_offsets.s.section = sectp; |
fd361982 | 13135 | dwp_file->sections.str_offsets.size = bfd_section_size (sectp); |
73869dc2 DE |
13136 | } |
13137 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
13138 | { | |
049412e3 | 13139 | dwp_file->sections.types.s.section = sectp; |
fd361982 | 13140 | dwp_file->sections.types.size = bfd_section_size (sectp); |
73869dc2 DE |
13141 | } |
13142 | } | |
13143 | ||
80626a55 | 13144 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 13145 | |
80626a55 DE |
13146 | static hashval_t |
13147 | hash_dwp_loaded_cutus (const void *item) | |
13148 | { | |
9a3c8263 | 13149 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 | 13150 | |
80626a55 DE |
13151 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
13152 | return dwo_unit->signature; | |
3019eac3 DE |
13153 | } |
13154 | ||
80626a55 | 13155 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 13156 | |
80626a55 DE |
13157 | static int |
13158 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 13159 | { |
9a3c8263 SM |
13160 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
13161 | const struct dwo_unit *dub = (const struct dwo_unit *) b; | |
3019eac3 | 13162 | |
80626a55 DE |
13163 | return dua->signature == dub->signature; |
13164 | } | |
3019eac3 | 13165 | |
80626a55 | 13166 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 13167 | |
80626a55 DE |
13168 | static htab_t |
13169 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
13170 | { | |
13171 | return htab_create_alloc_ex (3, | |
13172 | hash_dwp_loaded_cutus, | |
13173 | eq_dwp_loaded_cutus, | |
13174 | NULL, | |
13175 | &objfile->objfile_obstack, | |
13176 | hashtab_obstack_allocate, | |
13177 | dummy_obstack_deallocate); | |
13178 | } | |
3019eac3 | 13179 | |
ab5088bf DE |
13180 | /* Try to open DWP file FILE_NAME. |
13181 | The result is the bfd handle of the file. | |
13182 | If there is a problem finding or opening the file, return NULL. | |
13183 | Upon success, the canonicalized path of the file is stored in the bfd, | |
13184 | same as symfile_bfd_open. */ | |
13185 | ||
192b62ce | 13186 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
13187 | open_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
13188 | const char *file_name) | |
ab5088bf | 13189 | { |
ed2dc618 SM |
13190 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (dwarf2_per_objfile, file_name, |
13191 | 1 /*is_dwp*/, | |
192b62ce | 13192 | 1 /*search_cwd*/)); |
6ac97d4c DE |
13193 | if (abfd != NULL) |
13194 | return abfd; | |
13195 | ||
13196 | /* Work around upstream bug 15652. | |
13197 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
13198 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
13199 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
13200 | of the executable's path may have discarded the needed info. | |
13201 | [IWBN if the dwp file name was recorded in the executable, akin to | |
13202 | .gnu_debuglink, but that doesn't exist yet.] | |
13203 | Strip the directory from FILE_NAME and search again. */ | |
13204 | if (*debug_file_directory != '\0') | |
13205 | { | |
13206 | /* Don't implicitly search the current directory here. | |
13207 | If the user wants to search "." to handle this case, | |
13208 | it must be added to debug-file-directory. */ | |
ed2dc618 SM |
13209 | return try_open_dwop_file (dwarf2_per_objfile, |
13210 | lbasename (file_name), 1 /*is_dwp*/, | |
6ac97d4c DE |
13211 | 0 /*search_cwd*/); |
13212 | } | |
13213 | ||
13214 | return NULL; | |
ab5088bf DE |
13215 | } |
13216 | ||
80626a55 DE |
13217 | /* Initialize the use of the DWP file for the current objfile. |
13218 | By convention the name of the DWP file is ${objfile}.dwp. | |
13219 | The result is NULL if it can't be found. */ | |
a766d390 | 13220 | |
400174b1 | 13221 | static std::unique_ptr<struct dwp_file> |
ed2dc618 | 13222 | open_and_init_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
80626a55 DE |
13223 | { |
13224 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 | 13225 | |
82bf32bc JK |
13226 | /* Try to find first .dwp for the binary file before any symbolic links |
13227 | resolving. */ | |
6c447423 DE |
13228 | |
13229 | /* If the objfile is a debug file, find the name of the real binary | |
13230 | file and get the name of dwp file from there. */ | |
d721ba37 | 13231 | std::string dwp_name; |
6c447423 DE |
13232 | if (objfile->separate_debug_objfile_backlink != NULL) |
13233 | { | |
13234 | struct objfile *backlink = objfile->separate_debug_objfile_backlink; | |
13235 | const char *backlink_basename = lbasename (backlink->original_name); | |
6c447423 | 13236 | |
d721ba37 | 13237 | dwp_name = ldirname (objfile->original_name) + SLASH_STRING + backlink_basename; |
6c447423 DE |
13238 | } |
13239 | else | |
d721ba37 PA |
13240 | dwp_name = objfile->original_name; |
13241 | ||
13242 | dwp_name += ".dwp"; | |
80626a55 | 13243 | |
ed2dc618 | 13244 | gdb_bfd_ref_ptr dbfd (open_dwp_file (dwarf2_per_objfile, dwp_name.c_str ())); |
82bf32bc JK |
13245 | if (dbfd == NULL |
13246 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
13247 | { | |
13248 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
d721ba37 PA |
13249 | dwp_name = objfile_name (objfile); |
13250 | dwp_name += ".dwp"; | |
ed2dc618 | 13251 | dbfd = open_dwp_file (dwarf2_per_objfile, dwp_name.c_str ()); |
82bf32bc JK |
13252 | } |
13253 | ||
80626a55 DE |
13254 | if (dbfd == NULL) |
13255 | { | |
b4f54984 | 13256 | if (dwarf_read_debug) |
d721ba37 | 13257 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name.c_str ()); |
400174b1 | 13258 | return std::unique_ptr<dwp_file> (); |
3019eac3 | 13259 | } |
400174b1 TT |
13260 | |
13261 | const char *name = bfd_get_filename (dbfd.get ()); | |
13262 | std::unique_ptr<struct dwp_file> dwp_file | |
13263 | (new struct dwp_file (name, std::move (dbfd))); | |
c906108c | 13264 | |
0a0f4c01 | 13265 | dwp_file->num_sections = elf_numsections (dwp_file->dbfd); |
80626a55 DE |
13266 | dwp_file->elf_sections = |
13267 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
13268 | dwp_file->num_sections, asection *); | |
13269 | ||
400174b1 TT |
13270 | bfd_map_over_sections (dwp_file->dbfd.get (), |
13271 | dwarf2_locate_common_dwp_sections, | |
13272 | dwp_file.get ()); | |
80626a55 | 13273 | |
400174b1 TT |
13274 | dwp_file->cus = create_dwp_hash_table (dwarf2_per_objfile, dwp_file.get (), |
13275 | 0); | |
80626a55 | 13276 | |
400174b1 TT |
13277 | dwp_file->tus = create_dwp_hash_table (dwarf2_per_objfile, dwp_file.get (), |
13278 | 1); | |
80626a55 | 13279 | |
73869dc2 | 13280 | /* The DWP file version is stored in the hash table. Oh well. */ |
08302ed2 DE |
13281 | if (dwp_file->cus && dwp_file->tus |
13282 | && dwp_file->cus->version != dwp_file->tus->version) | |
73869dc2 DE |
13283 | { |
13284 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 13285 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 13286 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
13287 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
13288 | " TU version %s [in DWP file %s]"), | |
13289 | pulongest (dwp_file->cus->version), | |
d721ba37 | 13290 | pulongest (dwp_file->tus->version), dwp_name.c_str ()); |
73869dc2 | 13291 | } |
08302ed2 DE |
13292 | |
13293 | if (dwp_file->cus) | |
13294 | dwp_file->version = dwp_file->cus->version; | |
13295 | else if (dwp_file->tus) | |
13296 | dwp_file->version = dwp_file->tus->version; | |
13297 | else | |
13298 | dwp_file->version = 2; | |
73869dc2 DE |
13299 | |
13300 | if (dwp_file->version == 2) | |
400174b1 TT |
13301 | bfd_map_over_sections (dwp_file->dbfd.get (), |
13302 | dwarf2_locate_v2_dwp_sections, | |
13303 | dwp_file.get ()); | |
73869dc2 | 13304 | |
19ac8c2e DE |
13305 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile); |
13306 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile); | |
80626a55 | 13307 | |
b4f54984 | 13308 | if (dwarf_read_debug) |
80626a55 DE |
13309 | { |
13310 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
13311 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
13312 | " %s CUs, %s TUs\n", |
13313 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
13314 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
13315 | } |
13316 | ||
13317 | return dwp_file; | |
3019eac3 | 13318 | } |
c906108c | 13319 | |
ab5088bf DE |
13320 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
13321 | ||
13322 | static struct dwp_file * | |
ed2dc618 | 13323 | get_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
ab5088bf DE |
13324 | { |
13325 | if (! dwarf2_per_objfile->dwp_checked) | |
13326 | { | |
ed2dc618 SM |
13327 | dwarf2_per_objfile->dwp_file |
13328 | = open_and_init_dwp_file (dwarf2_per_objfile); | |
ab5088bf DE |
13329 | dwarf2_per_objfile->dwp_checked = 1; |
13330 | } | |
400174b1 | 13331 | return dwarf2_per_objfile->dwp_file.get (); |
ab5088bf DE |
13332 | } |
13333 | ||
80626a55 DE |
13334 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
13335 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
13336 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 13337 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
13338 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
13339 | ||
13340 | This is called, for example, when wanting to read a variable with a | |
13341 | complex location. Therefore we don't want to do file i/o for every call. | |
13342 | Therefore we don't want to look for a DWO file on every call. | |
13343 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
13344 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
13345 | for a DWO file. | |
13346 | ||
1c658ad5 | 13347 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 13348 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 13349 | |
3019eac3 | 13350 | static struct dwo_unit * |
80626a55 DE |
13351 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
13352 | const char *dwo_name, const char *comp_dir, | |
13353 | ULONGEST signature, int is_debug_types) | |
3019eac3 | 13354 | { |
ed2dc618 | 13355 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_unit->dwarf2_per_objfile; |
3019eac3 | 13356 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
80626a55 DE |
13357 | const char *kind = is_debug_types ? "TU" : "CU"; |
13358 | void **dwo_file_slot; | |
3019eac3 | 13359 | struct dwo_file *dwo_file; |
80626a55 | 13360 | struct dwp_file *dwp_file; |
cb1df416 | 13361 | |
6a506a2d DE |
13362 | /* First see if there's a DWP file. |
13363 | If we have a DWP file but didn't find the DWO inside it, don't | |
13364 | look for the original DWO file. It makes gdb behave differently | |
13365 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 13366 | |
ed2dc618 | 13367 | dwp_file = get_dwp_file (dwarf2_per_objfile); |
80626a55 | 13368 | if (dwp_file != NULL) |
cf2c3c16 | 13369 | { |
80626a55 DE |
13370 | const struct dwp_hash_table *dwp_htab = |
13371 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
13372 | ||
13373 | if (dwp_htab != NULL) | |
13374 | { | |
13375 | struct dwo_unit *dwo_cutu = | |
ed2dc618 | 13376 | lookup_dwo_unit_in_dwp (dwarf2_per_objfile, dwp_file, comp_dir, |
57d63ce2 | 13377 | signature, is_debug_types); |
80626a55 DE |
13378 | |
13379 | if (dwo_cutu != NULL) | |
13380 | { | |
b4f54984 | 13381 | if (dwarf_read_debug) |
80626a55 DE |
13382 | { |
13383 | fprintf_unfiltered (gdb_stdlog, | |
13384 | "Virtual DWO %s %s found: @%s\n", | |
13385 | kind, hex_string (signature), | |
13386 | host_address_to_string (dwo_cutu)); | |
13387 | } | |
13388 | return dwo_cutu; | |
13389 | } | |
13390 | } | |
13391 | } | |
6a506a2d | 13392 | else |
80626a55 | 13393 | { |
6a506a2d | 13394 | /* No DWP file, look for the DWO file. */ |
80626a55 | 13395 | |
ed2dc618 SM |
13396 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
13397 | dwo_name, comp_dir); | |
6a506a2d | 13398 | if (*dwo_file_slot == NULL) |
80626a55 | 13399 | { |
6a506a2d DE |
13400 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
13401 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 13402 | } |
6a506a2d | 13403 | /* NOTE: This will be NULL if unable to open the file. */ |
9a3c8263 | 13404 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
3019eac3 | 13405 | |
6a506a2d | 13406 | if (dwo_file != NULL) |
19c3d4c9 | 13407 | { |
6a506a2d DE |
13408 | struct dwo_unit *dwo_cutu = NULL; |
13409 | ||
13410 | if (is_debug_types && dwo_file->tus) | |
13411 | { | |
13412 | struct dwo_unit find_dwo_cutu; | |
13413 | ||
13414 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
13415 | find_dwo_cutu.signature = signature; | |
9a3c8263 SM |
13416 | dwo_cutu |
13417 | = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_cutu); | |
6a506a2d | 13418 | } |
33c5cd75 | 13419 | else if (!is_debug_types && dwo_file->cus) |
80626a55 | 13420 | { |
33c5cd75 DB |
13421 | struct dwo_unit find_dwo_cutu; |
13422 | ||
13423 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
13424 | find_dwo_cutu.signature = signature; | |
13425 | dwo_cutu = (struct dwo_unit *)htab_find (dwo_file->cus, | |
13426 | &find_dwo_cutu); | |
6a506a2d DE |
13427 | } |
13428 | ||
13429 | if (dwo_cutu != NULL) | |
13430 | { | |
b4f54984 | 13431 | if (dwarf_read_debug) |
6a506a2d DE |
13432 | { |
13433 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
13434 | kind, dwo_name, hex_string (signature), | |
13435 | host_address_to_string (dwo_cutu)); | |
13436 | } | |
13437 | return dwo_cutu; | |
80626a55 DE |
13438 | } |
13439 | } | |
2e276125 | 13440 | } |
9cdd5dbd | 13441 | |
80626a55 DE |
13442 | /* We didn't find it. This could mean a dwo_id mismatch, or |
13443 | someone deleted the DWO/DWP file, or the search path isn't set up | |
13444 | correctly to find the file. */ | |
13445 | ||
b4f54984 | 13446 | if (dwarf_read_debug) |
80626a55 DE |
13447 | { |
13448 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
13449 | kind, dwo_name, hex_string (signature)); | |
13450 | } | |
3019eac3 | 13451 | |
6656a72d DE |
13452 | /* This is a warning and not a complaint because it can be caused by |
13453 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
13454 | { |
13455 | /* Print the name of the DWP file if we looked there, helps the user | |
13456 | better diagnose the problem. */ | |
791afaa2 | 13457 | std::string dwp_text; |
43942612 DE |
13458 | |
13459 | if (dwp_file != NULL) | |
791afaa2 TT |
13460 | dwp_text = string_printf (" [in DWP file %s]", |
13461 | lbasename (dwp_file->name)); | |
43942612 | 13462 | |
9d8780f0 | 13463 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s" |
43942612 DE |
13464 | " [in module %s]"), |
13465 | kind, dwo_name, hex_string (signature), | |
791afaa2 | 13466 | dwp_text.c_str (), |
43942612 | 13467 | this_unit->is_debug_types ? "TU" : "CU", |
9d8780f0 | 13468 | sect_offset_str (this_unit->sect_off), objfile_name (objfile)); |
43942612 | 13469 | } |
3019eac3 | 13470 | return NULL; |
5fb290d7 DJ |
13471 | } |
13472 | ||
80626a55 DE |
13473 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
13474 | See lookup_dwo_cutu_unit for details. */ | |
13475 | ||
13476 | static struct dwo_unit * | |
13477 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
13478 | const char *dwo_name, const char *comp_dir, | |
13479 | ULONGEST signature) | |
13480 | { | |
13481 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
13482 | } | |
13483 | ||
13484 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
13485 | See lookup_dwo_cutu_unit for details. */ | |
13486 | ||
13487 | static struct dwo_unit * | |
13488 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
13489 | const char *dwo_name, const char *comp_dir) | |
13490 | { | |
13491 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
13492 | } | |
13493 | ||
89e63ee4 DE |
13494 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
13495 | ||
13496 | static int | |
13497 | queue_and_load_dwo_tu (void **slot, void *info) | |
13498 | { | |
13499 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
13500 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
13501 | ULONGEST signature = dwo_unit->signature; | |
13502 | struct signatured_type *sig_type = | |
13503 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
13504 | ||
13505 | if (sig_type != NULL) | |
13506 | { | |
13507 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
13508 | ||
13509 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
13510 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
13511 | while processing PER_CU. */ | |
13512 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
13513 | load_full_type_unit (sig_cu); | |
13514 | VEC_safe_push (dwarf2_per_cu_ptr, per_cu->imported_symtabs, sig_cu); | |
13515 | } | |
13516 | ||
13517 | return 1; | |
13518 | } | |
13519 | ||
13520 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
13521 | The DWO may have the only definition of the type, though it may not be | |
13522 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
13523 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
13524 | ||
13525 | static void | |
13526 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
13527 | { | |
13528 | struct dwo_unit *dwo_unit; | |
13529 | struct dwo_file *dwo_file; | |
13530 | ||
13531 | gdb_assert (!per_cu->is_debug_types); | |
ed2dc618 | 13532 | gdb_assert (get_dwp_file (per_cu->dwarf2_per_objfile) == NULL); |
89e63ee4 DE |
13533 | gdb_assert (per_cu->cu != NULL); |
13534 | ||
13535 | dwo_unit = per_cu->cu->dwo_unit; | |
13536 | gdb_assert (dwo_unit != NULL); | |
13537 | ||
13538 | dwo_file = dwo_unit->dwo_file; | |
13539 | if (dwo_file->tus != NULL) | |
13540 | htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu); | |
13541 | } | |
13542 | ||
3019eac3 | 13543 | /* Read in various DIEs. */ |
348e048f | 13544 | |
d389af10 | 13545 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). |
3e43a32a MS |
13546 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
13547 | already referenced by DW_AT_abstract_origin from the children of the | |
13548 | current DIE. */ | |
d389af10 JK |
13549 | |
13550 | static void | |
13551 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
13552 | { | |
13553 | struct die_info *child_die; | |
791afaa2 | 13554 | sect_offset *offsetp; |
d389af10 JK |
13555 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
13556 | struct die_info *origin_die; | |
13557 | /* Iterator of the ORIGIN_DIE children. */ | |
13558 | struct die_info *origin_child_die; | |
d389af10 | 13559 | struct attribute *attr; |
cd02d79d PA |
13560 | struct dwarf2_cu *origin_cu; |
13561 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
13562 | |
13563 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
13564 | if (!attr) | |
13565 | return; | |
13566 | ||
cd02d79d PA |
13567 | /* Note that following die references may follow to a die in a |
13568 | different cu. */ | |
13569 | ||
13570 | origin_cu = cu; | |
13571 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
13572 | ||
13573 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
13574 | symbols in. */ | |
13575 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
13576 | origin_cu->list_in_scope = cu->list_in_scope; | |
13577 | ||
edb3359d DJ |
13578 | if (die->tag != origin_die->tag |
13579 | && !(die->tag == DW_TAG_inlined_subroutine | |
13580 | && origin_die->tag == DW_TAG_subprogram)) | |
b98664d3 | 13581 | complaint (_("DIE %s and its abstract origin %s have different tags"), |
9d8780f0 SM |
13582 | sect_offset_str (die->sect_off), |
13583 | sect_offset_str (origin_die->sect_off)); | |
d389af10 | 13584 | |
791afaa2 | 13585 | std::vector<sect_offset> offsets; |
d389af10 | 13586 | |
3ea89b92 PMR |
13587 | for (child_die = die->child; |
13588 | child_die && child_die->tag; | |
13589 | child_die = sibling_die (child_die)) | |
13590 | { | |
13591 | struct die_info *child_origin_die; | |
13592 | struct dwarf2_cu *child_origin_cu; | |
13593 | ||
13594 | /* We are trying to process concrete instance entries: | |
216f72a1 | 13595 | DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but |
3ea89b92 PMR |
13596 | it's not relevant to our analysis here. i.e. detecting DIEs that are |
13597 | present in the abstract instance but not referenced in the concrete | |
13598 | one. */ | |
216f72a1 JK |
13599 | if (child_die->tag == DW_TAG_call_site |
13600 | || child_die->tag == DW_TAG_GNU_call_site) | |
3ea89b92 PMR |
13601 | continue; |
13602 | ||
c38f313d DJ |
13603 | /* For each CHILD_DIE, find the corresponding child of |
13604 | ORIGIN_DIE. If there is more than one layer of | |
13605 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
13606 | but GCC versions at least through 4.4 generate this (GCC PR | |
13607 | 40573). */ | |
3ea89b92 PMR |
13608 | child_origin_die = child_die; |
13609 | child_origin_cu = cu; | |
c38f313d DJ |
13610 | while (1) |
13611 | { | |
cd02d79d PA |
13612 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
13613 | child_origin_cu); | |
c38f313d DJ |
13614 | if (attr == NULL) |
13615 | break; | |
cd02d79d PA |
13616 | child_origin_die = follow_die_ref (child_origin_die, attr, |
13617 | &child_origin_cu); | |
c38f313d DJ |
13618 | } |
13619 | ||
d389af10 JK |
13620 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
13621 | counterpart may exist. */ | |
c38f313d | 13622 | if (child_origin_die != child_die) |
d389af10 | 13623 | { |
edb3359d DJ |
13624 | if (child_die->tag != child_origin_die->tag |
13625 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
13626 | && child_origin_die->tag == DW_TAG_subprogram)) | |
b98664d3 | 13627 | complaint (_("Child DIE %s and its abstract origin %s have " |
9c541725 | 13628 | "different tags"), |
9d8780f0 SM |
13629 | sect_offset_str (child_die->sect_off), |
13630 | sect_offset_str (child_origin_die->sect_off)); | |
c38f313d | 13631 | if (child_origin_die->parent != origin_die) |
b98664d3 | 13632 | complaint (_("Child DIE %s and its abstract origin %s have " |
9c541725 | 13633 | "different parents"), |
9d8780f0 SM |
13634 | sect_offset_str (child_die->sect_off), |
13635 | sect_offset_str (child_origin_die->sect_off)); | |
c38f313d | 13636 | else |
791afaa2 | 13637 | offsets.push_back (child_origin_die->sect_off); |
d389af10 | 13638 | } |
d389af10 | 13639 | } |
791afaa2 TT |
13640 | std::sort (offsets.begin (), offsets.end ()); |
13641 | sect_offset *offsets_end = offsets.data () + offsets.size (); | |
13642 | for (offsetp = offsets.data () + 1; offsetp < offsets_end; offsetp++) | |
9c541725 | 13643 | if (offsetp[-1] == *offsetp) |
b98664d3 | 13644 | complaint (_("Multiple children of DIE %s refer " |
9d8780f0 SM |
13645 | "to DIE %s as their abstract origin"), |
13646 | sect_offset_str (die->sect_off), sect_offset_str (*offsetp)); | |
d389af10 | 13647 | |
791afaa2 | 13648 | offsetp = offsets.data (); |
d389af10 JK |
13649 | origin_child_die = origin_die->child; |
13650 | while (origin_child_die && origin_child_die->tag) | |
13651 | { | |
13652 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 | 13653 | while (offsetp < offsets_end |
9c541725 | 13654 | && *offsetp < origin_child_die->sect_off) |
d389af10 | 13655 | offsetp++; |
b64f50a1 | 13656 | if (offsetp >= offsets_end |
9c541725 | 13657 | || *offsetp > origin_child_die->sect_off) |
d389af10 | 13658 | { |
adde2bff DE |
13659 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
13660 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
13661 | This can happen with mutually referenced abstract_origins. | |
13662 | PR 16581. */ | |
13663 | if (!origin_child_die->in_process) | |
13664 | process_die (origin_child_die, origin_cu); | |
d389af10 JK |
13665 | } |
13666 | origin_child_die = sibling_die (origin_child_die); | |
13667 | } | |
cd02d79d | 13668 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
d389af10 JK |
13669 | } |
13670 | ||
c906108c | 13671 | static void |
e7c27a73 | 13672 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13673 | { |
518817b3 | 13674 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 13675 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 13676 | struct context_stack *newobj; |
c906108c SS |
13677 | CORE_ADDR lowpc; |
13678 | CORE_ADDR highpc; | |
13679 | struct die_info *child_die; | |
edb3359d | 13680 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 13681 | const char *name; |
e142c38c | 13682 | CORE_ADDR baseaddr; |
801e3a5b | 13683 | struct block *block; |
edb3359d | 13684 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
2f4732b0 | 13685 | std::vector<struct symbol *> template_args; |
34eaf542 | 13686 | struct template_symbol *templ_func = NULL; |
edb3359d DJ |
13687 | |
13688 | if (inlined_func) | |
13689 | { | |
13690 | /* If we do not have call site information, we can't show the | |
13691 | caller of this inlined function. That's too confusing, so | |
13692 | only use the scope for local variables. */ | |
13693 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
13694 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
13695 | if (call_line == NULL || call_file == NULL) | |
13696 | { | |
13697 | read_lexical_block_scope (die, cu); | |
13698 | return; | |
13699 | } | |
13700 | } | |
c906108c | 13701 | |
e142c38c DJ |
13702 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
13703 | ||
94af9270 | 13704 | name = dwarf2_name (die, cu); |
c906108c | 13705 | |
e8d05480 JB |
13706 | /* Ignore functions with missing or empty names. These are actually |
13707 | illegal according to the DWARF standard. */ | |
13708 | if (name == NULL) | |
13709 | { | |
b98664d3 | 13710 | complaint (_("missing name for subprogram DIE at %s"), |
9d8780f0 | 13711 | sect_offset_str (die->sect_off)); |
e8d05480 JB |
13712 | return; |
13713 | } | |
13714 | ||
13715 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
3a2b436a | 13716 | if (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL) |
e385593e | 13717 | <= PC_BOUNDS_INVALID) |
e8d05480 | 13718 | { |
ae4d0c03 PM |
13719 | attr = dwarf2_attr (die, DW_AT_external, cu); |
13720 | if (!attr || !DW_UNSND (attr)) | |
b98664d3 | 13721 | complaint (_("cannot get low and high bounds " |
9d8780f0 SM |
13722 | "for subprogram DIE at %s"), |
13723 | sect_offset_str (die->sect_off)); | |
e8d05480 JB |
13724 | return; |
13725 | } | |
c906108c | 13726 | |
3e29f34a MR |
13727 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
13728 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 13729 | |
34eaf542 TT |
13730 | /* If we have any template arguments, then we must allocate a |
13731 | different sort of symbol. */ | |
13732 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
13733 | { | |
13734 | if (child_die->tag == DW_TAG_template_type_param | |
13735 | || child_die->tag == DW_TAG_template_value_param) | |
13736 | { | |
e623cf5d | 13737 | templ_func = allocate_template_symbol (objfile); |
cf724bc9 | 13738 | templ_func->subclass = SYMBOL_TEMPLATE; |
34eaf542 TT |
13739 | break; |
13740 | } | |
13741 | } | |
13742 | ||
c24bdb02 | 13743 | newobj = cu->get_builder ()->push_context (0, lowpc); |
5e2db402 TT |
13744 | newobj->name = new_symbol (die, read_type_die (die, cu), cu, |
13745 | (struct symbol *) templ_func); | |
4c2df51b | 13746 | |
81873cc8 TV |
13747 | if (dwarf2_flag_true_p (die, DW_AT_main_subprogram, cu)) |
13748 | set_objfile_main_name (objfile, SYMBOL_LINKAGE_NAME (newobj->name), | |
13749 | cu->language); | |
13750 | ||
4cecd739 DJ |
13751 | /* If there is a location expression for DW_AT_frame_base, record |
13752 | it. */ | |
e142c38c | 13753 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 13754 | if (attr) |
fe978cb0 | 13755 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
4c2df51b | 13756 | |
63e43d3a PMR |
13757 | /* If there is a location for the static link, record it. */ |
13758 | newobj->static_link = NULL; | |
13759 | attr = dwarf2_attr (die, DW_AT_static_link, cu); | |
13760 | if (attr) | |
13761 | { | |
224c3ddb SM |
13762 | newobj->static_link |
13763 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); | |
9a49df9d AB |
13764 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link, |
13765 | dwarf2_per_cu_addr_type (cu->per_cu)); | |
63e43d3a PMR |
13766 | } |
13767 | ||
c24bdb02 | 13768 | cu->list_in_scope = cu->get_builder ()->get_local_symbols (); |
c906108c | 13769 | |
639d11d3 | 13770 | if (die->child != NULL) |
c906108c | 13771 | { |
639d11d3 | 13772 | child_die = die->child; |
c906108c SS |
13773 | while (child_die && child_die->tag) |
13774 | { | |
34eaf542 TT |
13775 | if (child_die->tag == DW_TAG_template_type_param |
13776 | || child_die->tag == DW_TAG_template_value_param) | |
13777 | { | |
13778 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
13779 | ||
f1078f66 | 13780 | if (arg != NULL) |
2f4732b0 | 13781 | template_args.push_back (arg); |
34eaf542 TT |
13782 | } |
13783 | else | |
13784 | process_die (child_die, cu); | |
c906108c SS |
13785 | child_die = sibling_die (child_die); |
13786 | } | |
13787 | } | |
13788 | ||
d389af10 JK |
13789 | inherit_abstract_dies (die, cu); |
13790 | ||
4a811a97 UW |
13791 | /* If we have a DW_AT_specification, we might need to import using |
13792 | directives from the context of the specification DIE. See the | |
13793 | comment in determine_prefix. */ | |
13794 | if (cu->language == language_cplus | |
13795 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
13796 | { | |
13797 | struct dwarf2_cu *spec_cu = cu; | |
13798 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
13799 | ||
13800 | while (spec_die) | |
13801 | { | |
13802 | child_die = spec_die->child; | |
13803 | while (child_die && child_die->tag) | |
13804 | { | |
13805 | if (child_die->tag == DW_TAG_imported_module) | |
13806 | process_die (child_die, spec_cu); | |
13807 | child_die = sibling_die (child_die); | |
13808 | } | |
13809 | ||
13810 | /* In some cases, GCC generates specification DIEs that | |
13811 | themselves contain DW_AT_specification attributes. */ | |
13812 | spec_die = die_specification (spec_die, &spec_cu); | |
13813 | } | |
13814 | } | |
13815 | ||
c24bdb02 | 13816 | struct context_stack cstk = cu->get_builder ()->pop_context (); |
c906108c | 13817 | /* Make a block for the local symbols within. */ |
c24bdb02 | 13818 | block = cu->get_builder ()->finish_block (cstk.name, cstk.old_blocks, |
804d2729 | 13819 | cstk.static_link, lowpc, highpc); |
801e3a5b | 13820 | |
df8a16a1 | 13821 | /* For C++, set the block's scope. */ |
45280282 IB |
13822 | if ((cu->language == language_cplus |
13823 | || cu->language == language_fortran | |
c44af4eb TT |
13824 | || cu->language == language_d |
13825 | || cu->language == language_rust) | |
4d4ec4e5 | 13826 | && cu->processing_has_namespace_info) |
195a3f6c TT |
13827 | block_set_scope (block, determine_prefix (die, cu), |
13828 | &objfile->objfile_obstack); | |
df8a16a1 | 13829 | |
801e3a5b JB |
13830 | /* If we have address ranges, record them. */ |
13831 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 13832 | |
a60f3166 | 13833 | gdbarch_make_symbol_special (gdbarch, cstk.name, objfile); |
3e29f34a | 13834 | |
34eaf542 | 13835 | /* Attach template arguments to function. */ |
2f4732b0 | 13836 | if (!template_args.empty ()) |
34eaf542 TT |
13837 | { |
13838 | gdb_assert (templ_func != NULL); | |
13839 | ||
2f4732b0 | 13840 | templ_func->n_template_arguments = template_args.size (); |
34eaf542 | 13841 | templ_func->template_arguments |
8d749320 SM |
13842 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
13843 | templ_func->n_template_arguments); | |
34eaf542 | 13844 | memcpy (templ_func->template_arguments, |
2f4732b0 | 13845 | template_args.data (), |
34eaf542 | 13846 | (templ_func->n_template_arguments * sizeof (struct symbol *))); |
3e1d3d8c TT |
13847 | |
13848 | /* Make sure that the symtab is set on the new symbols. Even | |
13849 | though they don't appear in this symtab directly, other parts | |
13850 | of gdb assume that symbols do, and this is reasonably | |
13851 | true. */ | |
8634679f | 13852 | for (symbol *sym : template_args) |
3e1d3d8c | 13853 | symbol_set_symtab (sym, symbol_symtab (templ_func)); |
34eaf542 TT |
13854 | } |
13855 | ||
208d8187 JB |
13856 | /* In C++, we can have functions nested inside functions (e.g., when |
13857 | a function declares a class that has methods). This means that | |
13858 | when we finish processing a function scope, we may need to go | |
13859 | back to building a containing block's symbol lists. */ | |
c24bdb02 KS |
13860 | *cu->get_builder ()->get_local_symbols () = cstk.locals; |
13861 | cu->get_builder ()->set_local_using_directives (cstk.local_using_directives); | |
208d8187 | 13862 | |
921e78cf JB |
13863 | /* If we've finished processing a top-level function, subsequent |
13864 | symbols go in the file symbol list. */ | |
c24bdb02 KS |
13865 | if (cu->get_builder ()->outermost_context_p ()) |
13866 | cu->list_in_scope = cu->get_builder ()->get_file_symbols (); | |
c906108c SS |
13867 | } |
13868 | ||
13869 | /* Process all the DIES contained within a lexical block scope. Start | |
13870 | a new scope, process the dies, and then close the scope. */ | |
13871 | ||
13872 | static void | |
e7c27a73 | 13873 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13874 | { |
518817b3 | 13875 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 13876 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
13877 | CORE_ADDR lowpc, highpc; |
13878 | struct die_info *child_die; | |
e142c38c DJ |
13879 | CORE_ADDR baseaddr; |
13880 | ||
13881 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
13882 | |
13883 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
13884 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
13885 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 13886 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 13887 | describe ranges. */ |
e385593e JK |
13888 | switch (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
13889 | { | |
13890 | case PC_BOUNDS_NOT_PRESENT: | |
13891 | /* DW_TAG_lexical_block has no attributes, process its children as if | |
13892 | there was no wrapping by that DW_TAG_lexical_block. | |
13893 | GCC does no longer produces such DWARF since GCC r224161. */ | |
13894 | for (child_die = die->child; | |
13895 | child_die != NULL && child_die->tag; | |
13896 | child_die = sibling_die (child_die)) | |
13897 | process_die (child_die, cu); | |
13898 | return; | |
13899 | case PC_BOUNDS_INVALID: | |
13900 | return; | |
13901 | } | |
3e29f34a MR |
13902 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
13903 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 13904 | |
c24bdb02 | 13905 | cu->get_builder ()->push_context (0, lowpc); |
639d11d3 | 13906 | if (die->child != NULL) |
c906108c | 13907 | { |
639d11d3 | 13908 | child_die = die->child; |
c906108c SS |
13909 | while (child_die && child_die->tag) |
13910 | { | |
e7c27a73 | 13911 | process_die (child_die, cu); |
c906108c SS |
13912 | child_die = sibling_die (child_die); |
13913 | } | |
13914 | } | |
3ea89b92 | 13915 | inherit_abstract_dies (die, cu); |
c24bdb02 | 13916 | struct context_stack cstk = cu->get_builder ()->pop_context (); |
c906108c | 13917 | |
c24bdb02 KS |
13918 | if (*cu->get_builder ()->get_local_symbols () != NULL |
13919 | || (*cu->get_builder ()->get_local_using_directives ()) != NULL) | |
c906108c | 13920 | { |
801e3a5b | 13921 | struct block *block |
c24bdb02 | 13922 | = cu->get_builder ()->finish_block (0, cstk.old_blocks, NULL, |
804d2729 | 13923 | cstk.start_addr, highpc); |
801e3a5b JB |
13924 | |
13925 | /* Note that recording ranges after traversing children, as we | |
13926 | do here, means that recording a parent's ranges entails | |
13927 | walking across all its children's ranges as they appear in | |
13928 | the address map, which is quadratic behavior. | |
13929 | ||
13930 | It would be nicer to record the parent's ranges before | |
13931 | traversing its children, simply overriding whatever you find | |
13932 | there. But since we don't even decide whether to create a | |
13933 | block until after we've traversed its children, that's hard | |
13934 | to do. */ | |
13935 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c | 13936 | } |
c24bdb02 KS |
13937 | *cu->get_builder ()->get_local_symbols () = cstk.locals; |
13938 | cu->get_builder ()->set_local_using_directives (cstk.local_using_directives); | |
c906108c SS |
13939 | } |
13940 | ||
216f72a1 | 13941 | /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */ |
96408a79 SA |
13942 | |
13943 | static void | |
13944 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
13945 | { | |
518817b3 | 13946 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
96408a79 SA |
13947 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
13948 | CORE_ADDR pc, baseaddr; | |
13949 | struct attribute *attr; | |
13950 | struct call_site *call_site, call_site_local; | |
13951 | void **slot; | |
13952 | int nparams; | |
13953 | struct die_info *child_die; | |
13954 | ||
13955 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
13956 | ||
216f72a1 JK |
13957 | attr = dwarf2_attr (die, DW_AT_call_return_pc, cu); |
13958 | if (attr == NULL) | |
13959 | { | |
13960 | /* This was a pre-DWARF-5 GNU extension alias | |
13961 | for DW_AT_call_return_pc. */ | |
13962 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
13963 | } | |
96408a79 SA |
13964 | if (!attr) |
13965 | { | |
b98664d3 | 13966 | complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site " |
9d8780f0 SM |
13967 | "DIE %s [in module %s]"), |
13968 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13969 | return; |
13970 | } | |
31aa7e4e | 13971 | pc = attr_value_as_address (attr) + baseaddr; |
3e29f34a | 13972 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
96408a79 SA |
13973 | |
13974 | if (cu->call_site_htab == NULL) | |
13975 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
13976 | NULL, &objfile->objfile_obstack, | |
13977 | hashtab_obstack_allocate, NULL); | |
13978 | call_site_local.pc = pc; | |
13979 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
13980 | if (*slot != NULL) | |
13981 | { | |
b98664d3 | 13982 | complaint (_("Duplicate PC %s for DW_TAG_call_site " |
9d8780f0 SM |
13983 | "DIE %s [in module %s]"), |
13984 | paddress (gdbarch, pc), sect_offset_str (die->sect_off), | |
4262abfb | 13985 | objfile_name (objfile)); |
96408a79 SA |
13986 | return; |
13987 | } | |
13988 | ||
13989 | /* Count parameters at the caller. */ | |
13990 | ||
13991 | nparams = 0; | |
13992 | for (child_die = die->child; child_die && child_die->tag; | |
13993 | child_die = sibling_die (child_die)) | |
13994 | { | |
216f72a1 JK |
13995 | if (child_die->tag != DW_TAG_call_site_parameter |
13996 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 | 13997 | { |
b98664d3 | 13998 | complaint (_("Tag %d is not DW_TAG_call_site_parameter in " |
9d8780f0 SM |
13999 | "DW_TAG_call_site child DIE %s [in module %s]"), |
14000 | child_die->tag, sect_offset_str (child_die->sect_off), | |
4262abfb | 14001 | objfile_name (objfile)); |
96408a79 SA |
14002 | continue; |
14003 | } | |
14004 | ||
14005 | nparams++; | |
14006 | } | |
14007 | ||
224c3ddb SM |
14008 | call_site |
14009 | = ((struct call_site *) | |
14010 | obstack_alloc (&objfile->objfile_obstack, | |
14011 | sizeof (*call_site) | |
14012 | + (sizeof (*call_site->parameter) * (nparams - 1)))); | |
96408a79 SA |
14013 | *slot = call_site; |
14014 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
14015 | call_site->pc = pc; | |
14016 | ||
216f72a1 JK |
14017 | if (dwarf2_flag_true_p (die, DW_AT_call_tail_call, cu) |
14018 | || dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
96408a79 SA |
14019 | { |
14020 | struct die_info *func_die; | |
14021 | ||
14022 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
14023 | for (func_die = die->parent; | |
14024 | func_die && func_die->tag != DW_TAG_subprogram | |
14025 | && func_die->tag != DW_TAG_subroutine_type; | |
14026 | func_die = func_die->parent); | |
14027 | ||
216f72a1 JK |
14028 | /* DW_AT_call_all_calls is a superset |
14029 | of DW_AT_call_all_tail_calls. */ | |
96408a79 | 14030 | if (func_die |
216f72a1 | 14031 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_calls, cu) |
96408a79 | 14032 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) |
216f72a1 | 14033 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_tail_calls, cu) |
96408a79 SA |
14034 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) |
14035 | { | |
14036 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
14037 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
14038 | both the initial caller containing the real return address PC and | |
14039 | the final callee containing the current PC of a chain of tail | |
14040 | calls do not need to have the tail call list complete. But any | |
14041 | function candidate for a virtual tail call frame searched via | |
14042 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
14043 | determined unambiguously. */ | |
14044 | } | |
14045 | else | |
14046 | { | |
14047 | struct type *func_type = NULL; | |
14048 | ||
14049 | if (func_die) | |
14050 | func_type = get_die_type (func_die, cu); | |
14051 | if (func_type != NULL) | |
14052 | { | |
14053 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
14054 | ||
14055 | /* Enlist this call site to the function. */ | |
14056 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
14057 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
14058 | } | |
14059 | else | |
b98664d3 | 14060 | complaint (_("Cannot find function owning DW_TAG_call_site " |
9d8780f0 SM |
14061 | "DIE %s [in module %s]"), |
14062 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
14063 | } |
14064 | } | |
14065 | ||
216f72a1 JK |
14066 | attr = dwarf2_attr (die, DW_AT_call_target, cu); |
14067 | if (attr == NULL) | |
14068 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
14069 | if (attr == NULL) | |
14070 | attr = dwarf2_attr (die, DW_AT_call_origin, cu); | |
96408a79 | 14071 | if (attr == NULL) |
216f72a1 JK |
14072 | { |
14073 | /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */ | |
14074 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
14075 | } | |
96408a79 SA |
14076 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); |
14077 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
14078 | /* Keep NULL DWARF_BLOCK. */; | |
14079 | else if (attr_form_is_block (attr)) | |
14080 | { | |
14081 | struct dwarf2_locexpr_baton *dlbaton; | |
14082 | ||
8d749320 | 14083 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
96408a79 SA |
14084 | dlbaton->data = DW_BLOCK (attr)->data; |
14085 | dlbaton->size = DW_BLOCK (attr)->size; | |
14086 | dlbaton->per_cu = cu->per_cu; | |
14087 | ||
14088 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
14089 | } | |
7771576e | 14090 | else if (attr_form_is_ref (attr)) |
96408a79 | 14091 | { |
96408a79 SA |
14092 | struct dwarf2_cu *target_cu = cu; |
14093 | struct die_info *target_die; | |
14094 | ||
ac9ec31b | 14095 | target_die = follow_die_ref (die, attr, &target_cu); |
518817b3 | 14096 | gdb_assert (target_cu->per_cu->dwarf2_per_objfile->objfile == objfile); |
96408a79 SA |
14097 | if (die_is_declaration (target_die, target_cu)) |
14098 | { | |
7d45c7c3 | 14099 | const char *target_physname; |
9112db09 JK |
14100 | |
14101 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
73b9be8b | 14102 | target_physname = dw2_linkage_name (target_die, target_cu); |
7d45c7c3 | 14103 | if (target_physname == NULL) |
9112db09 | 14104 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
96408a79 | 14105 | if (target_physname == NULL) |
b98664d3 | 14106 | complaint (_("DW_AT_call_target target DIE has invalid " |
9d8780f0 SM |
14107 | "physname, for referencing DIE %s [in module %s]"), |
14108 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 | 14109 | else |
7d455152 | 14110 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
14111 | } |
14112 | else | |
14113 | { | |
14114 | CORE_ADDR lowpc; | |
14115 | ||
14116 | /* DW_AT_entry_pc should be preferred. */ | |
3a2b436a | 14117 | if (dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL) |
e385593e | 14118 | <= PC_BOUNDS_INVALID) |
b98664d3 | 14119 | complaint (_("DW_AT_call_target target DIE has invalid " |
9d8780f0 SM |
14120 | "low pc, for referencing DIE %s [in module %s]"), |
14121 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 | 14122 | else |
3e29f34a MR |
14123 | { |
14124 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); | |
14125 | SET_FIELD_PHYSADDR (call_site->target, lowpc); | |
14126 | } | |
96408a79 SA |
14127 | } |
14128 | } | |
14129 | else | |
b98664d3 | 14130 | complaint (_("DW_TAG_call_site DW_AT_call_target is neither " |
9d8780f0 SM |
14131 | "block nor reference, for DIE %s [in module %s]"), |
14132 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
14133 | |
14134 | call_site->per_cu = cu->per_cu; | |
14135 | ||
14136 | for (child_die = die->child; | |
14137 | child_die && child_die->tag; | |
14138 | child_die = sibling_die (child_die)) | |
14139 | { | |
96408a79 | 14140 | struct call_site_parameter *parameter; |
1788b2d3 | 14141 | struct attribute *loc, *origin; |
96408a79 | 14142 | |
216f72a1 JK |
14143 | if (child_die->tag != DW_TAG_call_site_parameter |
14144 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
14145 | { |
14146 | /* Already printed the complaint above. */ | |
14147 | continue; | |
14148 | } | |
14149 | ||
14150 | gdb_assert (call_site->parameter_count < nparams); | |
14151 | parameter = &call_site->parameter[call_site->parameter_count]; | |
14152 | ||
1788b2d3 JK |
14153 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
14154 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
216f72a1 | 14155 | register is contained in DW_AT_call_value. */ |
96408a79 | 14156 | |
24c5c679 | 14157 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
216f72a1 JK |
14158 | origin = dwarf2_attr (child_die, DW_AT_call_parameter, cu); |
14159 | if (origin == NULL) | |
14160 | { | |
14161 | /* This was a pre-DWARF-5 GNU extension alias | |
14162 | for DW_AT_call_parameter. */ | |
14163 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); | |
14164 | } | |
7771576e | 14165 | if (loc == NULL && origin != NULL && attr_form_is_ref (origin)) |
1788b2d3 | 14166 | { |
1788b2d3 | 14167 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; |
9c541725 PA |
14168 | |
14169 | sect_offset sect_off | |
14170 | = (sect_offset) dwarf2_get_ref_die_offset (origin); | |
14171 | if (!offset_in_cu_p (&cu->header, sect_off)) | |
d76b7dbc JK |
14172 | { |
14173 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
14174 | binding can be done only inside one CU. Such referenced DIE | |
14175 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
b98664d3 | 14176 | complaint (_("DW_AT_call_parameter offset is not in CU for " |
9d8780f0 SM |
14177 | "DW_TAG_call_site child DIE %s [in module %s]"), |
14178 | sect_offset_str (child_die->sect_off), | |
9c541725 | 14179 | objfile_name (objfile)); |
d76b7dbc JK |
14180 | continue; |
14181 | } | |
9c541725 PA |
14182 | parameter->u.param_cu_off |
14183 | = (cu_offset) (sect_off - cu->header.sect_off); | |
1788b2d3 JK |
14184 | } |
14185 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 | 14186 | { |
b98664d3 | 14187 | complaint (_("No DW_FORM_block* DW_AT_location for " |
9d8780f0 SM |
14188 | "DW_TAG_call_site child DIE %s [in module %s]"), |
14189 | sect_offset_str (child_die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
14190 | continue; |
14191 | } | |
24c5c679 | 14192 | else |
96408a79 | 14193 | { |
24c5c679 JK |
14194 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
14195 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
14196 | if (parameter->u.dwarf_reg != -1) | |
14197 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
14198 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
14199 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
14200 | ¶meter->u.fb_offset)) | |
14201 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
14202 | else | |
14203 | { | |
b98664d3 | 14204 | complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported " |
24c5c679 | 14205 | "for DW_FORM_block* DW_AT_location is supported for " |
9d8780f0 | 14206 | "DW_TAG_call_site child DIE %s " |
24c5c679 | 14207 | "[in module %s]"), |
9d8780f0 | 14208 | sect_offset_str (child_die->sect_off), |
9c541725 | 14209 | objfile_name (objfile)); |
24c5c679 JK |
14210 | continue; |
14211 | } | |
96408a79 SA |
14212 | } |
14213 | ||
216f72a1 JK |
14214 | attr = dwarf2_attr (child_die, DW_AT_call_value, cu); |
14215 | if (attr == NULL) | |
14216 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
96408a79 SA |
14217 | if (!attr_form_is_block (attr)) |
14218 | { | |
b98664d3 | 14219 | complaint (_("No DW_FORM_block* DW_AT_call_value for " |
9d8780f0 SM |
14220 | "DW_TAG_call_site child DIE %s [in module %s]"), |
14221 | sect_offset_str (child_die->sect_off), | |
9c541725 | 14222 | objfile_name (objfile)); |
96408a79 SA |
14223 | continue; |
14224 | } | |
14225 | parameter->value = DW_BLOCK (attr)->data; | |
14226 | parameter->value_size = DW_BLOCK (attr)->size; | |
14227 | ||
14228 | /* Parameters are not pre-cleared by memset above. */ | |
14229 | parameter->data_value = NULL; | |
14230 | parameter->data_value_size = 0; | |
14231 | call_site->parameter_count++; | |
14232 | ||
216f72a1 JK |
14233 | attr = dwarf2_attr (child_die, DW_AT_call_data_value, cu); |
14234 | if (attr == NULL) | |
14235 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
96408a79 SA |
14236 | if (attr) |
14237 | { | |
14238 | if (!attr_form_is_block (attr)) | |
b98664d3 | 14239 | complaint (_("No DW_FORM_block* DW_AT_call_data_value for " |
9d8780f0 SM |
14240 | "DW_TAG_call_site child DIE %s [in module %s]"), |
14241 | sect_offset_str (child_die->sect_off), | |
9c541725 | 14242 | objfile_name (objfile)); |
96408a79 SA |
14243 | else |
14244 | { | |
14245 | parameter->data_value = DW_BLOCK (attr)->data; | |
14246 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
14247 | } | |
14248 | } | |
14249 | } | |
14250 | } | |
14251 | ||
71a3c369 TT |
14252 | /* Helper function for read_variable. If DIE represents a virtual |
14253 | table, then return the type of the concrete object that is | |
14254 | associated with the virtual table. Otherwise, return NULL. */ | |
14255 | ||
14256 | static struct type * | |
14257 | rust_containing_type (struct die_info *die, struct dwarf2_cu *cu) | |
14258 | { | |
14259 | struct attribute *attr = dwarf2_attr (die, DW_AT_type, cu); | |
14260 | if (attr == NULL) | |
14261 | return NULL; | |
14262 | ||
14263 | /* Find the type DIE. */ | |
14264 | struct die_info *type_die = NULL; | |
14265 | struct dwarf2_cu *type_cu = cu; | |
14266 | ||
14267 | if (attr_form_is_ref (attr)) | |
14268 | type_die = follow_die_ref (die, attr, &type_cu); | |
14269 | if (type_die == NULL) | |
14270 | return NULL; | |
14271 | ||
14272 | if (dwarf2_attr (type_die, DW_AT_containing_type, type_cu) == NULL) | |
14273 | return NULL; | |
14274 | return die_containing_type (type_die, type_cu); | |
14275 | } | |
14276 | ||
14277 | /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */ | |
14278 | ||
14279 | static void | |
14280 | read_variable (struct die_info *die, struct dwarf2_cu *cu) | |
14281 | { | |
14282 | struct rust_vtable_symbol *storage = NULL; | |
14283 | ||
14284 | if (cu->language == language_rust) | |
14285 | { | |
14286 | struct type *containing_type = rust_containing_type (die, cu); | |
14287 | ||
14288 | if (containing_type != NULL) | |
14289 | { | |
518817b3 | 14290 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
71a3c369 TT |
14291 | |
14292 | storage = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
14293 | struct rust_vtable_symbol); | |
14294 | initialize_objfile_symbol (storage); | |
14295 | storage->concrete_type = containing_type; | |
cf724bc9 | 14296 | storage->subclass = SYMBOL_RUST_VTABLE; |
71a3c369 TT |
14297 | } |
14298 | } | |
14299 | ||
e4a62c65 TV |
14300 | struct symbol *res = new_symbol (die, NULL, cu, storage); |
14301 | struct attribute *abstract_origin | |
14302 | = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
14303 | struct attribute *loc = dwarf2_attr (die, DW_AT_location, cu); | |
14304 | if (res == NULL && loc && abstract_origin) | |
14305 | { | |
14306 | /* We have a variable without a name, but with a location and an abstract | |
14307 | origin. This may be a concrete instance of an abstract variable | |
14308 | referenced from an DW_OP_GNU_variable_value, so save it to find it back | |
14309 | later. */ | |
14310 | struct dwarf2_cu *origin_cu = cu; | |
14311 | struct die_info *origin_die | |
14312 | = follow_die_ref (die, abstract_origin, &origin_cu); | |
14313 | dwarf2_per_objfile *dpo = cu->per_cu->dwarf2_per_objfile; | |
3360b6e7 | 14314 | dpo->abstract_to_concrete[origin_die->sect_off].push_back (die->sect_off); |
e4a62c65 | 14315 | } |
71a3c369 TT |
14316 | } |
14317 | ||
43988095 JK |
14318 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET |
14319 | reading .debug_rnglists. | |
14320 | Callback's type should be: | |
14321 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
14322 | Return true if the attributes are present and valid, otherwise, | |
14323 | return false. */ | |
14324 | ||
14325 | template <typename Callback> | |
14326 | static bool | |
14327 | dwarf2_rnglists_process (unsigned offset, struct dwarf2_cu *cu, | |
14328 | Callback &&callback) | |
14329 | { | |
ed2dc618 | 14330 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 14331 | = cu->per_cu->dwarf2_per_objfile; |
ed2dc618 | 14332 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
43988095 | 14333 | bfd *obfd = objfile->obfd; |
43988095 JK |
14334 | /* Base address selection entry. */ |
14335 | CORE_ADDR base; | |
14336 | int found_base; | |
43988095 | 14337 | const gdb_byte *buffer; |
43988095 JK |
14338 | CORE_ADDR baseaddr; |
14339 | bool overflow = false; | |
14340 | ||
14341 | found_base = cu->base_known; | |
14342 | base = cu->base_address; | |
14343 | ||
14344 | dwarf2_read_section (objfile, &dwarf2_per_objfile->rnglists); | |
14345 | if (offset >= dwarf2_per_objfile->rnglists.size) | |
14346 | { | |
b98664d3 | 14347 | complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"), |
43988095 JK |
14348 | offset); |
14349 | return false; | |
14350 | } | |
14351 | buffer = dwarf2_per_objfile->rnglists.buffer + offset; | |
14352 | ||
14353 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
14354 | ||
14355 | while (1) | |
14356 | { | |
7814882a JK |
14357 | /* Initialize it due to a false compiler warning. */ |
14358 | CORE_ADDR range_beginning = 0, range_end = 0; | |
43988095 JK |
14359 | const gdb_byte *buf_end = (dwarf2_per_objfile->rnglists.buffer |
14360 | + dwarf2_per_objfile->rnglists.size); | |
14361 | unsigned int bytes_read; | |
14362 | ||
14363 | if (buffer == buf_end) | |
14364 | { | |
14365 | overflow = true; | |
14366 | break; | |
14367 | } | |
14368 | const auto rlet = static_cast<enum dwarf_range_list_entry>(*buffer++); | |
14369 | switch (rlet) | |
14370 | { | |
14371 | case DW_RLE_end_of_list: | |
14372 | break; | |
14373 | case DW_RLE_base_address: | |
14374 | if (buffer + cu->header.addr_size > buf_end) | |
14375 | { | |
14376 | overflow = true; | |
14377 | break; | |
14378 | } | |
14379 | base = read_address (obfd, buffer, cu, &bytes_read); | |
14380 | found_base = 1; | |
14381 | buffer += bytes_read; | |
14382 | break; | |
14383 | case DW_RLE_start_length: | |
14384 | if (buffer + cu->header.addr_size > buf_end) | |
14385 | { | |
14386 | overflow = true; | |
14387 | break; | |
14388 | } | |
14389 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
14390 | buffer += bytes_read; | |
14391 | range_end = (range_beginning | |
14392 | + read_unsigned_leb128 (obfd, buffer, &bytes_read)); | |
14393 | buffer += bytes_read; | |
14394 | if (buffer > buf_end) | |
14395 | { | |
14396 | overflow = true; | |
14397 | break; | |
14398 | } | |
14399 | break; | |
14400 | case DW_RLE_offset_pair: | |
14401 | range_beginning = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
14402 | buffer += bytes_read; | |
14403 | if (buffer > buf_end) | |
14404 | { | |
14405 | overflow = true; | |
14406 | break; | |
14407 | } | |
14408 | range_end = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
14409 | buffer += bytes_read; | |
14410 | if (buffer > buf_end) | |
14411 | { | |
14412 | overflow = true; | |
14413 | break; | |
14414 | } | |
14415 | break; | |
14416 | case DW_RLE_start_end: | |
14417 | if (buffer + 2 * cu->header.addr_size > buf_end) | |
14418 | { | |
14419 | overflow = true; | |
14420 | break; | |
14421 | } | |
14422 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
14423 | buffer += bytes_read; | |
14424 | range_end = read_address (obfd, buffer, cu, &bytes_read); | |
14425 | buffer += bytes_read; | |
14426 | break; | |
14427 | default: | |
b98664d3 | 14428 | complaint (_("Invalid .debug_rnglists data (no base address)")); |
43988095 JK |
14429 | return false; |
14430 | } | |
14431 | if (rlet == DW_RLE_end_of_list || overflow) | |
14432 | break; | |
14433 | if (rlet == DW_RLE_base_address) | |
14434 | continue; | |
14435 | ||
14436 | if (!found_base) | |
14437 | { | |
14438 | /* We have no valid base address for the ranges | |
14439 | data. */ | |
b98664d3 | 14440 | complaint (_("Invalid .debug_rnglists data (no base address)")); |
43988095 JK |
14441 | return false; |
14442 | } | |
14443 | ||
14444 | if (range_beginning > range_end) | |
14445 | { | |
14446 | /* Inverted range entries are invalid. */ | |
b98664d3 | 14447 | complaint (_("Invalid .debug_rnglists data (inverted range)")); |
43988095 JK |
14448 | return false; |
14449 | } | |
14450 | ||
14451 | /* Empty range entries have no effect. */ | |
14452 | if (range_beginning == range_end) | |
14453 | continue; | |
14454 | ||
14455 | range_beginning += base; | |
14456 | range_end += base; | |
14457 | ||
14458 | /* A not-uncommon case of bad debug info. | |
14459 | Don't pollute the addrmap with bad data. */ | |
14460 | if (range_beginning + baseaddr == 0 | |
14461 | && !dwarf2_per_objfile->has_section_at_zero) | |
14462 | { | |
b98664d3 | 14463 | complaint (_(".debug_rnglists entry has start address of zero" |
43988095 JK |
14464 | " [in module %s]"), objfile_name (objfile)); |
14465 | continue; | |
14466 | } | |
14467 | ||
14468 | callback (range_beginning, range_end); | |
14469 | } | |
14470 | ||
14471 | if (overflow) | |
14472 | { | |
b98664d3 | 14473 | complaint (_("Offset %d is not terminated " |
43988095 JK |
14474 | "for DW_AT_ranges attribute"), |
14475 | offset); | |
14476 | return false; | |
14477 | } | |
14478 | ||
14479 | return true; | |
14480 | } | |
14481 | ||
14482 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges. | |
14483 | Callback's type should be: | |
14484 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
5f46c5a5 | 14485 | Return 1 if the attributes are present and valid, otherwise, return 0. */ |
43039443 | 14486 | |
43988095 | 14487 | template <typename Callback> |
43039443 | 14488 | static int |
5f46c5a5 | 14489 | dwarf2_ranges_process (unsigned offset, struct dwarf2_cu *cu, |
43988095 | 14490 | Callback &&callback) |
43039443 | 14491 | { |
ed2dc618 | 14492 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 14493 | = cu->per_cu->dwarf2_per_objfile; |
ed2dc618 | 14494 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
43039443 JK |
14495 | struct comp_unit_head *cu_header = &cu->header; |
14496 | bfd *obfd = objfile->obfd; | |
14497 | unsigned int addr_size = cu_header->addr_size; | |
14498 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
14499 | /* Base address selection entry. */ | |
14500 | CORE_ADDR base; | |
14501 | int found_base; | |
14502 | unsigned int dummy; | |
d521ce57 | 14503 | const gdb_byte *buffer; |
ff013f42 | 14504 | CORE_ADDR baseaddr; |
43039443 | 14505 | |
43988095 JK |
14506 | if (cu_header->version >= 5) |
14507 | return dwarf2_rnglists_process (offset, cu, callback); | |
14508 | ||
d00adf39 DE |
14509 | found_base = cu->base_known; |
14510 | base = cu->base_address; | |
43039443 | 14511 | |
be391dca | 14512 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 14513 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 | 14514 | { |
b98664d3 | 14515 | complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"), |
43039443 JK |
14516 | offset); |
14517 | return 0; | |
14518 | } | |
dce234bc | 14519 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 | 14520 | |
e7030f15 | 14521 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 14522 | |
43039443 JK |
14523 | while (1) |
14524 | { | |
14525 | CORE_ADDR range_beginning, range_end; | |
14526 | ||
14527 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
14528 | buffer += addr_size; | |
14529 | range_end = read_address (obfd, buffer, cu, &dummy); | |
14530 | buffer += addr_size; | |
14531 | offset += 2 * addr_size; | |
14532 | ||
14533 | /* An end of list marker is a pair of zero addresses. */ | |
14534 | if (range_beginning == 0 && range_end == 0) | |
14535 | /* Found the end of list entry. */ | |
14536 | break; | |
14537 | ||
14538 | /* Each base address selection entry is a pair of 2 values. | |
14539 | The first is the largest possible address, the second is | |
14540 | the base address. Check for a base address here. */ | |
14541 | if ((range_beginning & mask) == mask) | |
14542 | { | |
28d2bfb9 AB |
14543 | /* If we found the largest possible address, then we already |
14544 | have the base address in range_end. */ | |
14545 | base = range_end; | |
43039443 JK |
14546 | found_base = 1; |
14547 | continue; | |
14548 | } | |
14549 | ||
14550 | if (!found_base) | |
14551 | { | |
14552 | /* We have no valid base address for the ranges | |
14553 | data. */ | |
b98664d3 | 14554 | complaint (_("Invalid .debug_ranges data (no base address)")); |
43039443 JK |
14555 | return 0; |
14556 | } | |
14557 | ||
9277c30c UW |
14558 | if (range_beginning > range_end) |
14559 | { | |
14560 | /* Inverted range entries are invalid. */ | |
b98664d3 | 14561 | complaint (_("Invalid .debug_ranges data (inverted range)")); |
9277c30c UW |
14562 | return 0; |
14563 | } | |
14564 | ||
14565 | /* Empty range entries have no effect. */ | |
14566 | if (range_beginning == range_end) | |
14567 | continue; | |
14568 | ||
43039443 JK |
14569 | range_beginning += base; |
14570 | range_end += base; | |
14571 | ||
01093045 DE |
14572 | /* A not-uncommon case of bad debug info. |
14573 | Don't pollute the addrmap with bad data. */ | |
14574 | if (range_beginning + baseaddr == 0 | |
14575 | && !dwarf2_per_objfile->has_section_at_zero) | |
14576 | { | |
b98664d3 | 14577 | complaint (_(".debug_ranges entry has start address of zero" |
4262abfb | 14578 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
14579 | continue; |
14580 | } | |
14581 | ||
5f46c5a5 JK |
14582 | callback (range_beginning, range_end); |
14583 | } | |
14584 | ||
14585 | return 1; | |
14586 | } | |
14587 | ||
14588 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. | |
14589 | Return 1 if the attributes are present and valid, otherwise, return 0. | |
14590 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
14591 | ||
14592 | static int | |
14593 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
14594 | CORE_ADDR *high_return, struct dwarf2_cu *cu, | |
14595 | struct partial_symtab *ranges_pst) | |
14596 | { | |
518817b3 | 14597 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
5f46c5a5 JK |
14598 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
14599 | const CORE_ADDR baseaddr = ANOFFSET (objfile->section_offsets, | |
14600 | SECT_OFF_TEXT (objfile)); | |
14601 | int low_set = 0; | |
14602 | CORE_ADDR low = 0; | |
14603 | CORE_ADDR high = 0; | |
14604 | int retval; | |
14605 | ||
14606 | retval = dwarf2_ranges_process (offset, cu, | |
14607 | [&] (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
14608 | { | |
9277c30c | 14609 | if (ranges_pst != NULL) |
3e29f34a MR |
14610 | { |
14611 | CORE_ADDR lowpc; | |
14612 | CORE_ADDR highpc; | |
14613 | ||
79748972 TT |
14614 | lowpc = (gdbarch_adjust_dwarf2_addr (gdbarch, |
14615 | range_beginning + baseaddr) | |
14616 | - baseaddr); | |
14617 | highpc = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
14618 | range_end + baseaddr) | |
14619 | - baseaddr); | |
d320c2b5 TT |
14620 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
14621 | lowpc, highpc - 1, ranges_pst); | |
3e29f34a | 14622 | } |
ff013f42 | 14623 | |
43039443 JK |
14624 | /* FIXME: This is recording everything as a low-high |
14625 | segment of consecutive addresses. We should have a | |
14626 | data structure for discontiguous block ranges | |
14627 | instead. */ | |
14628 | if (! low_set) | |
14629 | { | |
14630 | low = range_beginning; | |
14631 | high = range_end; | |
14632 | low_set = 1; | |
14633 | } | |
14634 | else | |
14635 | { | |
14636 | if (range_beginning < low) | |
14637 | low = range_beginning; | |
14638 | if (range_end > high) | |
14639 | high = range_end; | |
14640 | } | |
5f46c5a5 JK |
14641 | }); |
14642 | if (!retval) | |
14643 | return 0; | |
43039443 JK |
14644 | |
14645 | if (! low_set) | |
14646 | /* If the first entry is an end-of-list marker, the range | |
14647 | describes an empty scope, i.e. no instructions. */ | |
14648 | return 0; | |
14649 | ||
14650 | if (low_return) | |
14651 | *low_return = low; | |
14652 | if (high_return) | |
14653 | *high_return = high; | |
14654 | return 1; | |
14655 | } | |
14656 | ||
3a2b436a JK |
14657 | /* Get low and high pc attributes from a die. See enum pc_bounds_kind |
14658 | definition for the return value. *LOWPC and *HIGHPC are set iff | |
e385593e | 14659 | neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */ |
380bca97 | 14660 | |
3a2b436a | 14661 | static enum pc_bounds_kind |
af34e669 | 14662 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
14663 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
14664 | struct partial_symtab *pst) | |
c906108c | 14665 | { |
518817b3 SM |
14666 | struct dwarf2_per_objfile *dwarf2_per_objfile |
14667 | = cu->per_cu->dwarf2_per_objfile; | |
c906108c | 14668 | struct attribute *attr; |
91da1414 | 14669 | struct attribute *attr_high; |
af34e669 DJ |
14670 | CORE_ADDR low = 0; |
14671 | CORE_ADDR high = 0; | |
e385593e | 14672 | enum pc_bounds_kind ret; |
c906108c | 14673 | |
91da1414 MW |
14674 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
14675 | if (attr_high) | |
af34e669 | 14676 | { |
e142c38c | 14677 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 | 14678 | if (attr) |
91da1414 | 14679 | { |
31aa7e4e JB |
14680 | low = attr_value_as_address (attr); |
14681 | high = attr_value_as_address (attr_high); | |
14682 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
14683 | high += low; | |
91da1414 | 14684 | } |
af34e669 DJ |
14685 | else |
14686 | /* Found high w/o low attribute. */ | |
e385593e | 14687 | return PC_BOUNDS_INVALID; |
af34e669 DJ |
14688 | |
14689 | /* Found consecutive range of addresses. */ | |
3a2b436a | 14690 | ret = PC_BOUNDS_HIGH_LOW; |
af34e669 | 14691 | } |
c906108c | 14692 | else |
af34e669 | 14693 | { |
e142c38c | 14694 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
14695 | if (attr != NULL) |
14696 | { | |
ab435259 DE |
14697 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
14698 | We take advantage of the fact that DW_AT_ranges does not appear | |
14699 | in DW_TAG_compile_unit of DWO files. */ | |
14700 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
14701 | unsigned int ranges_offset = (DW_UNSND (attr) | |
14702 | + (need_ranges_base | |
14703 | ? cu->ranges_base | |
14704 | : 0)); | |
2e3cf129 | 14705 | |
af34e669 | 14706 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 14707 | .debug_ranges section. */ |
2e3cf129 | 14708 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
e385593e | 14709 | return PC_BOUNDS_INVALID; |
43039443 | 14710 | /* Found discontinuous range of addresses. */ |
3a2b436a | 14711 | ret = PC_BOUNDS_RANGES; |
af34e669 | 14712 | } |
e385593e JK |
14713 | else |
14714 | return PC_BOUNDS_NOT_PRESENT; | |
af34e669 | 14715 | } |
c906108c | 14716 | |
48fbe735 | 14717 | /* partial_die_info::read has also the strict LOW < HIGH requirement. */ |
9373cf26 | 14718 | if (high <= low) |
e385593e | 14719 | return PC_BOUNDS_INVALID; |
c906108c SS |
14720 | |
14721 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
14722 | eliminate duplicate copies of functions and vtables and such. | |
14723 | The linker will arbitrarily choose one and discard the others. | |
14724 | The AT_*_pc values for such functions refer to local labels in | |
14725 | these sections. If the section from that file was discarded, the | |
14726 | labels are not in the output, so the relocs get a value of 0. | |
14727 | If this is a discarded function, mark the pc bounds as invalid, | |
14728 | so that GDB will ignore it. */ | |
72dca2f5 | 14729 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
e385593e | 14730 | return PC_BOUNDS_INVALID; |
c906108c SS |
14731 | |
14732 | *lowpc = low; | |
96408a79 SA |
14733 | if (highpc) |
14734 | *highpc = high; | |
af34e669 | 14735 | return ret; |
c906108c SS |
14736 | } |
14737 | ||
b084d499 JB |
14738 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
14739 | its low and high PC addresses. Do nothing if these addresses could not | |
14740 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
14741 | and HIGHPC to the high address if greater than HIGHPC. */ | |
14742 | ||
14743 | static void | |
14744 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
14745 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
14746 | struct dwarf2_cu *cu) | |
14747 | { | |
14748 | CORE_ADDR low, high; | |
14749 | struct die_info *child = die->child; | |
14750 | ||
e385593e | 14751 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL) >= PC_BOUNDS_RANGES) |
b084d499 | 14752 | { |
325fac50 PA |
14753 | *lowpc = std::min (*lowpc, low); |
14754 | *highpc = std::max (*highpc, high); | |
b084d499 JB |
14755 | } |
14756 | ||
14757 | /* If the language does not allow nested subprograms (either inside | |
14758 | subprograms or lexical blocks), we're done. */ | |
14759 | if (cu->language != language_ada) | |
14760 | return; | |
6e70227d | 14761 | |
b084d499 JB |
14762 | /* Check all the children of the given DIE. If it contains nested |
14763 | subprograms, then check their pc bounds. Likewise, we need to | |
14764 | check lexical blocks as well, as they may also contain subprogram | |
14765 | definitions. */ | |
14766 | while (child && child->tag) | |
14767 | { | |
14768 | if (child->tag == DW_TAG_subprogram | |
14769 | || child->tag == DW_TAG_lexical_block) | |
14770 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
14771 | child = sibling_die (child); | |
14772 | } | |
14773 | } | |
14774 | ||
fae299cd DC |
14775 | /* Get the low and high pc's represented by the scope DIE, and store |
14776 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
14777 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
14778 | ||
14779 | static void | |
14780 | get_scope_pc_bounds (struct die_info *die, | |
14781 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
14782 | struct dwarf2_cu *cu) | |
14783 | { | |
14784 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
14785 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
14786 | CORE_ADDR current_low, current_high; | |
14787 | ||
3a2b436a | 14788 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL) |
e385593e | 14789 | >= PC_BOUNDS_RANGES) |
fae299cd DC |
14790 | { |
14791 | best_low = current_low; | |
14792 | best_high = current_high; | |
14793 | } | |
14794 | else | |
14795 | { | |
14796 | struct die_info *child = die->child; | |
14797 | ||
14798 | while (child && child->tag) | |
14799 | { | |
14800 | switch (child->tag) { | |
14801 | case DW_TAG_subprogram: | |
b084d499 | 14802 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
14803 | break; |
14804 | case DW_TAG_namespace: | |
f55ee35c | 14805 | case DW_TAG_module: |
fae299cd DC |
14806 | /* FIXME: carlton/2004-01-16: Should we do this for |
14807 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
14808 | that current GCC's always emit the DIEs corresponding | |
14809 | to definitions of methods of classes as children of a | |
14810 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
14811 | the DIEs giving the declarations, which could be | |
14812 | anywhere). But I don't see any reason why the | |
14813 | standards says that they have to be there. */ | |
14814 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
14815 | ||
14816 | if (current_low != ((CORE_ADDR) -1)) | |
14817 | { | |
325fac50 PA |
14818 | best_low = std::min (best_low, current_low); |
14819 | best_high = std::max (best_high, current_high); | |
fae299cd DC |
14820 | } |
14821 | break; | |
14822 | default: | |
0963b4bd | 14823 | /* Ignore. */ |
fae299cd DC |
14824 | break; |
14825 | } | |
14826 | ||
14827 | child = sibling_die (child); | |
14828 | } | |
14829 | } | |
14830 | ||
14831 | *lowpc = best_low; | |
14832 | *highpc = best_high; | |
14833 | } | |
14834 | ||
801e3a5b JB |
14835 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
14836 | in DIE. */ | |
380bca97 | 14837 | |
801e3a5b JB |
14838 | static void |
14839 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
14840 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
14841 | { | |
518817b3 | 14842 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 14843 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
801e3a5b | 14844 | struct attribute *attr; |
91da1414 | 14845 | struct attribute *attr_high; |
801e3a5b | 14846 | |
91da1414 MW |
14847 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
14848 | if (attr_high) | |
801e3a5b | 14849 | { |
801e3a5b JB |
14850 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
14851 | if (attr) | |
14852 | { | |
31aa7e4e JB |
14853 | CORE_ADDR low = attr_value_as_address (attr); |
14854 | CORE_ADDR high = attr_value_as_address (attr_high); | |
14855 | ||
14856 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
14857 | high += low; | |
9a619af0 | 14858 | |
3e29f34a MR |
14859 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
14860 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); | |
c24bdb02 | 14861 | cu->get_builder ()->record_block_range (block, low, high - 1); |
801e3a5b JB |
14862 | } |
14863 | } | |
14864 | ||
14865 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
14866 | if (attr) | |
14867 | { | |
ab435259 DE |
14868 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
14869 | We take advantage of the fact that DW_AT_ranges does not appear | |
14870 | in DW_TAG_compile_unit of DWO files. */ | |
14871 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
14872 | |
14873 | /* The value of the DW_AT_ranges attribute is the offset of the | |
14874 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
14875 | unsigned long offset = (DW_UNSND (attr) |
14876 | + (need_ranges_base ? cu->ranges_base : 0)); | |
801e3a5b | 14877 | |
2d5f09ec | 14878 | std::vector<blockrange> blockvec; |
5f46c5a5 JK |
14879 | dwarf2_ranges_process (offset, cu, |
14880 | [&] (CORE_ADDR start, CORE_ADDR end) | |
14881 | { | |
58fdfd2c JK |
14882 | start += baseaddr; |
14883 | end += baseaddr; | |
5f46c5a5 JK |
14884 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
14885 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); | |
c24bdb02 | 14886 | cu->get_builder ()->record_block_range (block, start, end - 1); |
2d5f09ec | 14887 | blockvec.emplace_back (start, end); |
5f46c5a5 | 14888 | }); |
2d5f09ec KB |
14889 | |
14890 | BLOCK_RANGES(block) = make_blockranges (objfile, blockvec); | |
801e3a5b JB |
14891 | } |
14892 | } | |
14893 | ||
685b1105 JK |
14894 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
14895 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 14896 | |
685b1105 JK |
14897 | static void |
14898 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 | 14899 | { |
38360086 | 14900 | int major, minor; |
60d5a603 JK |
14901 | |
14902 | if (cu->producer == NULL) | |
14903 | { | |
14904 | /* For unknown compilers expect their behavior is DWARF version | |
14905 | compliant. | |
14906 | ||
14907 | GCC started to support .debug_types sections by -gdwarf-4 since | |
14908 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
14909 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
14910 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
14911 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 14912 | } |
b1ffba5a | 14913 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
60d5a603 | 14914 | { |
38360086 MW |
14915 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
14916 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
685b1105 | 14917 | } |
5230b05a | 14918 | else if (producer_is_icc (cu->producer, &major, &minor)) |
eb77c9df AB |
14919 | { |
14920 | cu->producer_is_icc = true; | |
14921 | cu->producer_is_icc_lt_14 = major < 14; | |
14922 | } | |
c258c396 JD |
14923 | else if (startswith (cu->producer, "CodeWarrior S12/L-ISA")) |
14924 | cu->producer_is_codewarrior = true; | |
685b1105 JK |
14925 | else |
14926 | { | |
14927 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
14928 | compliant. */ | |
60d5a603 JK |
14929 | } |
14930 | ||
9068261f | 14931 | cu->checked_producer = true; |
685b1105 | 14932 | } |
ba919b58 | 14933 | |
685b1105 JK |
14934 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
14935 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
14936 | during 4.6.0 experimental. */ | |
14937 | ||
9068261f | 14938 | static bool |
685b1105 JK |
14939 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) |
14940 | { | |
14941 | if (!cu->checked_producer) | |
14942 | check_producer (cu); | |
14943 | ||
14944 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
14945 | } |
14946 | ||
c258c396 JD |
14947 | |
14948 | /* Codewarrior (at least as of version 5.0.40) generates dwarf line information | |
14949 | with incorrect is_stmt attributes. */ | |
14950 | ||
14951 | static bool | |
14952 | producer_is_codewarrior (struct dwarf2_cu *cu) | |
14953 | { | |
14954 | if (!cu->checked_producer) | |
14955 | check_producer (cu); | |
14956 | ||
14957 | return cu->producer_is_codewarrior; | |
14958 | } | |
14959 | ||
60d5a603 JK |
14960 | /* Return the default accessibility type if it is not overriden by |
14961 | DW_AT_accessibility. */ | |
14962 | ||
14963 | static enum dwarf_access_attribute | |
14964 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
14965 | { | |
14966 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
14967 | { | |
14968 | /* The default DWARF 2 accessibility for members is public, the default | |
14969 | accessibility for inheritance is private. */ | |
14970 | ||
14971 | if (die->tag != DW_TAG_inheritance) | |
14972 | return DW_ACCESS_public; | |
14973 | else | |
14974 | return DW_ACCESS_private; | |
14975 | } | |
14976 | else | |
14977 | { | |
14978 | /* DWARF 3+ defines the default accessibility a different way. The same | |
14979 | rules apply now for DW_TAG_inheritance as for the members and it only | |
14980 | depends on the container kind. */ | |
14981 | ||
14982 | if (die->parent->tag == DW_TAG_class_type) | |
14983 | return DW_ACCESS_private; | |
14984 | else | |
14985 | return DW_ACCESS_public; | |
14986 | } | |
14987 | } | |
14988 | ||
74ac6d43 TT |
14989 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
14990 | offset. If the attribute was not found return 0, otherwise return | |
14991 | 1. If it was found but could not properly be handled, set *OFFSET | |
14992 | to 0. */ | |
14993 | ||
14994 | static int | |
14995 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
14996 | LONGEST *offset) | |
14997 | { | |
14998 | struct attribute *attr; | |
14999 | ||
15000 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
15001 | if (attr != NULL) | |
15002 | { | |
15003 | *offset = 0; | |
15004 | ||
15005 | /* Note that we do not check for a section offset first here. | |
15006 | This is because DW_AT_data_member_location is new in DWARF 4, | |
15007 | so if we see it, we can assume that a constant form is really | |
15008 | a constant and not a section offset. */ | |
15009 | if (attr_form_is_constant (attr)) | |
15010 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
15011 | else if (attr_form_is_section_offset (attr)) | |
15012 | dwarf2_complex_location_expr_complaint (); | |
15013 | else if (attr_form_is_block (attr)) | |
15014 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
15015 | else | |
15016 | dwarf2_complex_location_expr_complaint (); | |
15017 | ||
15018 | return 1; | |
15019 | } | |
15020 | ||
15021 | return 0; | |
15022 | } | |
15023 | ||
c906108c SS |
15024 | /* Add an aggregate field to the field list. */ |
15025 | ||
15026 | static void | |
107d2387 | 15027 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 15028 | struct dwarf2_cu *cu) |
6e70227d | 15029 | { |
518817b3 | 15030 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
5e2b427d | 15031 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
15032 | struct nextfield *new_field; |
15033 | struct attribute *attr; | |
15034 | struct field *fp; | |
15d034d0 | 15035 | const char *fieldname = ""; |
c906108c | 15036 | |
7d0ccb61 DJ |
15037 | if (die->tag == DW_TAG_inheritance) |
15038 | { | |
be2daae6 TT |
15039 | fip->baseclasses.emplace_back (); |
15040 | new_field = &fip->baseclasses.back (); | |
7d0ccb61 DJ |
15041 | } |
15042 | else | |
15043 | { | |
be2daae6 TT |
15044 | fip->fields.emplace_back (); |
15045 | new_field = &fip->fields.back (); | |
7d0ccb61 | 15046 | } |
be2daae6 | 15047 | |
c906108c SS |
15048 | fip->nfields++; |
15049 | ||
e142c38c | 15050 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
15051 | if (attr) |
15052 | new_field->accessibility = DW_UNSND (attr); | |
60d5a603 JK |
15053 | else |
15054 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
15055 | if (new_field->accessibility != DW_ACCESS_public) |
15056 | fip->non_public_fields = 1; | |
60d5a603 | 15057 | |
e142c38c | 15058 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
15059 | if (attr) |
15060 | new_field->virtuality = DW_UNSND (attr); | |
60d5a603 JK |
15061 | else |
15062 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
15063 | |
15064 | fp = &new_field->field; | |
a9a9bd0f | 15065 | |
e142c38c | 15066 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 15067 | { |
74ac6d43 TT |
15068 | LONGEST offset; |
15069 | ||
a9a9bd0f | 15070 | /* Data member other than a C++ static data member. */ |
6e70227d | 15071 | |
c906108c | 15072 | /* Get type of field. */ |
e7c27a73 | 15073 | fp->type = die_type (die, cu); |
c906108c | 15074 | |
d6a843b5 | 15075 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 15076 | |
c906108c | 15077 | /* Get bit size of field (zero if none). */ |
e142c38c | 15078 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
15079 | if (attr) |
15080 | { | |
15081 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
15082 | } | |
15083 | else | |
15084 | { | |
15085 | FIELD_BITSIZE (*fp) = 0; | |
15086 | } | |
15087 | ||
15088 | /* Get bit offset of field. */ | |
74ac6d43 TT |
15089 | if (handle_data_member_location (die, cu, &offset)) |
15090 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 15091 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
15092 | if (attr) |
15093 | { | |
5e2b427d | 15094 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
15095 | { |
15096 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
15097 | additional bit offset from the MSB of the containing |
15098 | anonymous object to the MSB of the field. We don't | |
15099 | have to do anything special since we don't need to | |
15100 | know the size of the anonymous object. */ | |
f41f5e61 | 15101 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
15102 | } |
15103 | else | |
15104 | { | |
15105 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
15106 | MSB of the anonymous object, subtract off the number of |
15107 | bits from the MSB of the field to the MSB of the | |
15108 | object, and then subtract off the number of bits of | |
15109 | the field itself. The result is the bit offset of | |
15110 | the LSB of the field. */ | |
c906108c SS |
15111 | int anonymous_size; |
15112 | int bit_offset = DW_UNSND (attr); | |
15113 | ||
e142c38c | 15114 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
15115 | if (attr) |
15116 | { | |
15117 | /* The size of the anonymous object containing | |
15118 | the bit field is explicit, so use the | |
15119 | indicated size (in bytes). */ | |
15120 | anonymous_size = DW_UNSND (attr); | |
15121 | } | |
15122 | else | |
15123 | { | |
15124 | /* The size of the anonymous object containing | |
15125 | the bit field must be inferred from the type | |
15126 | attribute of the data member containing the | |
15127 | bit field. */ | |
15128 | anonymous_size = TYPE_LENGTH (fp->type); | |
15129 | } | |
f41f5e61 PA |
15130 | SET_FIELD_BITPOS (*fp, |
15131 | (FIELD_BITPOS (*fp) | |
15132 | + anonymous_size * bits_per_byte | |
15133 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
15134 | } |
15135 | } | |
da5b30da AA |
15136 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
15137 | if (attr != NULL) | |
15138 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) | |
15139 | + dwarf2_get_attr_constant_value (attr, 0))); | |
c906108c SS |
15140 | |
15141 | /* Get name of field. */ | |
39cbfefa DJ |
15142 | fieldname = dwarf2_name (die, cu); |
15143 | if (fieldname == NULL) | |
15144 | fieldname = ""; | |
d8151005 DJ |
15145 | |
15146 | /* The name is already allocated along with this objfile, so we don't | |
15147 | need to duplicate it for the type. */ | |
15148 | fp->name = fieldname; | |
c906108c SS |
15149 | |
15150 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 15151 | pointer or virtual base class pointer) to private. */ |
e142c38c | 15152 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 15153 | { |
d48cc9dd | 15154 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
15155 | new_field->accessibility = DW_ACCESS_private; |
15156 | fip->non_public_fields = 1; | |
15157 | } | |
15158 | } | |
a9a9bd0f | 15159 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 15160 | { |
a9a9bd0f DC |
15161 | /* C++ static member. */ |
15162 | ||
15163 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
15164 | is a declaration, but all versions of G++ as of this writing | |
15165 | (so through at least 3.2.1) incorrectly generate | |
15166 | DW_TAG_variable tags. */ | |
6e70227d | 15167 | |
ff355380 | 15168 | const char *physname; |
c906108c | 15169 | |
a9a9bd0f | 15170 | /* Get name of field. */ |
39cbfefa DJ |
15171 | fieldname = dwarf2_name (die, cu); |
15172 | if (fieldname == NULL) | |
c906108c SS |
15173 | return; |
15174 | ||
254e6b9e | 15175 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
15176 | if (attr |
15177 | /* Only create a symbol if this is an external value. | |
15178 | new_symbol checks this and puts the value in the global symbol | |
15179 | table, which we want. If it is not external, new_symbol | |
15180 | will try to put the value in cu->list_in_scope which is wrong. */ | |
15181 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
15182 | { |
15183 | /* A static const member, not much different than an enum as far as | |
15184 | we're concerned, except that we can support more types. */ | |
15185 | new_symbol (die, NULL, cu); | |
15186 | } | |
15187 | ||
2df3850c | 15188 | /* Get physical name. */ |
ff355380 | 15189 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 15190 | |
d8151005 DJ |
15191 | /* The name is already allocated along with this objfile, so we don't |
15192 | need to duplicate it for the type. */ | |
15193 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 15194 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 15195 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
15196 | } |
15197 | else if (die->tag == DW_TAG_inheritance) | |
15198 | { | |
74ac6d43 | 15199 | LONGEST offset; |
d4b96c9a | 15200 | |
74ac6d43 TT |
15201 | /* C++ base class field. */ |
15202 | if (handle_data_member_location (die, cu, &offset)) | |
15203 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 15204 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 15205 | FIELD_TYPE (*fp) = die_type (die, cu); |
a737d952 | 15206 | FIELD_NAME (*fp) = TYPE_NAME (fp->type); |
c906108c | 15207 | } |
2ddeaf8a TT |
15208 | else if (die->tag == DW_TAG_variant_part) |
15209 | { | |
15210 | /* process_structure_scope will treat this DIE as a union. */ | |
15211 | process_structure_scope (die, cu); | |
15212 | ||
15213 | /* The variant part is relative to the start of the enclosing | |
15214 | structure. */ | |
15215 | SET_FIELD_BITPOS (*fp, 0); | |
15216 | fp->type = get_die_type (die, cu); | |
15217 | fp->artificial = 1; | |
15218 | fp->name = "<<variant>>"; | |
c8c81635 TT |
15219 | |
15220 | /* Normally a DW_TAG_variant_part won't have a size, but our | |
15221 | representation requires one, so set it to the maximum of the | |
15222 | child sizes. */ | |
15223 | if (TYPE_LENGTH (fp->type) == 0) | |
15224 | { | |
15225 | unsigned max = 0; | |
15226 | for (int i = 0; i < TYPE_NFIELDS (fp->type); ++i) | |
15227 | if (TYPE_LENGTH (TYPE_FIELD_TYPE (fp->type, i)) > max) | |
15228 | max = TYPE_LENGTH (TYPE_FIELD_TYPE (fp->type, i)); | |
15229 | TYPE_LENGTH (fp->type) = max; | |
15230 | } | |
2ddeaf8a TT |
15231 | } |
15232 | else | |
15233 | gdb_assert_not_reached ("missing case in dwarf2_add_field"); | |
c906108c SS |
15234 | } |
15235 | ||
883fd55a KS |
15236 | /* Can the type given by DIE define another type? */ |
15237 | ||
15238 | static bool | |
15239 | type_can_define_types (const struct die_info *die) | |
15240 | { | |
15241 | switch (die->tag) | |
15242 | { | |
15243 | case DW_TAG_typedef: | |
15244 | case DW_TAG_class_type: | |
15245 | case DW_TAG_structure_type: | |
15246 | case DW_TAG_union_type: | |
15247 | case DW_TAG_enumeration_type: | |
15248 | return true; | |
15249 | ||
15250 | default: | |
15251 | return false; | |
15252 | } | |
15253 | } | |
15254 | ||
15255 | /* Add a type definition defined in the scope of the FIP's class. */ | |
98751a41 JK |
15256 | |
15257 | static void | |
883fd55a KS |
15258 | dwarf2_add_type_defn (struct field_info *fip, struct die_info *die, |
15259 | struct dwarf2_cu *cu) | |
6e70227d | 15260 | { |
be2daae6 TT |
15261 | struct decl_field fp; |
15262 | memset (&fp, 0, sizeof (fp)); | |
98751a41 | 15263 | |
883fd55a | 15264 | gdb_assert (type_can_define_types (die)); |
98751a41 | 15265 | |
883fd55a | 15266 | /* Get name of field. NULL is okay here, meaning an anonymous type. */ |
be2daae6 TT |
15267 | fp.name = dwarf2_name (die, cu); |
15268 | fp.type = read_type_die (die, cu); | |
98751a41 | 15269 | |
c191a687 KS |
15270 | /* Save accessibility. */ |
15271 | enum dwarf_access_attribute accessibility; | |
15272 | struct attribute *attr = dwarf2_attr (die, DW_AT_accessibility, cu); | |
15273 | if (attr != NULL) | |
15274 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); | |
15275 | else | |
15276 | accessibility = dwarf2_default_access_attribute (die, cu); | |
15277 | switch (accessibility) | |
15278 | { | |
15279 | case DW_ACCESS_public: | |
15280 | /* The assumed value if neither private nor protected. */ | |
15281 | break; | |
15282 | case DW_ACCESS_private: | |
be2daae6 | 15283 | fp.is_private = 1; |
c191a687 KS |
15284 | break; |
15285 | case DW_ACCESS_protected: | |
be2daae6 | 15286 | fp.is_protected = 1; |
c191a687 KS |
15287 | break; |
15288 | default: | |
b98664d3 | 15289 | complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility); |
c191a687 KS |
15290 | } |
15291 | ||
883fd55a | 15292 | if (die->tag == DW_TAG_typedef) |
be2daae6 | 15293 | fip->typedef_field_list.push_back (fp); |
883fd55a | 15294 | else |
be2daae6 | 15295 | fip->nested_types_list.push_back (fp); |
98751a41 JK |
15296 | } |
15297 | ||
c906108c SS |
15298 | /* Create the vector of fields, and attach it to the type. */ |
15299 | ||
15300 | static void | |
fba45db2 | 15301 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 15302 | struct dwarf2_cu *cu) |
c906108c SS |
15303 | { |
15304 | int nfields = fip->nfields; | |
15305 | ||
15306 | /* Record the field count, allocate space for the array of fields, | |
15307 | and create blank accessibility bitfields if necessary. */ | |
15308 | TYPE_NFIELDS (type) = nfields; | |
15309 | TYPE_FIELDS (type) = (struct field *) | |
be2daae6 | 15310 | TYPE_ZALLOC (type, sizeof (struct field) * nfields); |
c906108c | 15311 | |
b4ba55a1 | 15312 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
15313 | { |
15314 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
15315 | ||
15316 | TYPE_FIELD_PRIVATE_BITS (type) = | |
15317 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
15318 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
15319 | ||
15320 | TYPE_FIELD_PROTECTED_BITS (type) = | |
15321 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
15322 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
15323 | ||
774b6a14 TT |
15324 | TYPE_FIELD_IGNORE_BITS (type) = |
15325 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
15326 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
15327 | } |
15328 | ||
15329 | /* If the type has baseclasses, allocate and clear a bit vector for | |
15330 | TYPE_FIELD_VIRTUAL_BITS. */ | |
be2daae6 | 15331 | if (!fip->baseclasses.empty () && cu->language != language_ada) |
c906108c | 15332 | { |
be2daae6 | 15333 | int num_bytes = B_BYTES (fip->baseclasses.size ()); |
fe1b8b76 | 15334 | unsigned char *pointer; |
c906108c SS |
15335 | |
15336 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
224c3ddb | 15337 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
fe1b8b76 | 15338 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
be2daae6 TT |
15339 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->baseclasses.size ()); |
15340 | TYPE_N_BASECLASSES (type) = fip->baseclasses.size (); | |
c906108c SS |
15341 | } |
15342 | ||
2ddeaf8a TT |
15343 | if (TYPE_FLAG_DISCRIMINATED_UNION (type)) |
15344 | { | |
15345 | struct discriminant_info *di = alloc_discriminant_info (type, -1, -1); | |
15346 | ||
be2daae6 | 15347 | for (int index = 0; index < nfields; ++index) |
2ddeaf8a | 15348 | { |
be2daae6 TT |
15349 | struct nextfield &field = fip->fields[index]; |
15350 | ||
15351 | if (field.variant.is_discriminant) | |
2ddeaf8a | 15352 | di->discriminant_index = index; |
be2daae6 | 15353 | else if (field.variant.default_branch) |
2ddeaf8a TT |
15354 | di->default_index = index; |
15355 | else | |
be2daae6 | 15356 | di->discriminants[index] = field.variant.discriminant_value; |
2ddeaf8a TT |
15357 | } |
15358 | } | |
15359 | ||
be2daae6 TT |
15360 | /* Copy the saved-up fields into the field vector. */ |
15361 | for (int i = 0; i < nfields; ++i) | |
c906108c | 15362 | { |
be2daae6 TT |
15363 | struct nextfield &field |
15364 | = ((i < fip->baseclasses.size ()) ? fip->baseclasses[i] | |
15365 | : fip->fields[i - fip->baseclasses.size ()]); | |
7d0ccb61 | 15366 | |
be2daae6 TT |
15367 | TYPE_FIELD (type, i) = field.field; |
15368 | switch (field.accessibility) | |
c906108c | 15369 | { |
c5aa993b | 15370 | case DW_ACCESS_private: |
b4ba55a1 | 15371 | if (cu->language != language_ada) |
be2daae6 | 15372 | SET_TYPE_FIELD_PRIVATE (type, i); |
c5aa993b | 15373 | break; |
c906108c | 15374 | |
c5aa993b | 15375 | case DW_ACCESS_protected: |
b4ba55a1 | 15376 | if (cu->language != language_ada) |
be2daae6 | 15377 | SET_TYPE_FIELD_PROTECTED (type, i); |
c5aa993b | 15378 | break; |
c906108c | 15379 | |
c5aa993b JM |
15380 | case DW_ACCESS_public: |
15381 | break; | |
c906108c | 15382 | |
c5aa993b JM |
15383 | default: |
15384 | /* Unknown accessibility. Complain and treat it as public. */ | |
15385 | { | |
b98664d3 | 15386 | complaint (_("unsupported accessibility %d"), |
be2daae6 | 15387 | field.accessibility); |
c5aa993b JM |
15388 | } |
15389 | break; | |
c906108c | 15390 | } |
be2daae6 | 15391 | if (i < fip->baseclasses.size ()) |
c906108c | 15392 | { |
be2daae6 | 15393 | switch (field.virtuality) |
c906108c | 15394 | { |
c5aa993b JM |
15395 | case DW_VIRTUALITY_virtual: |
15396 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 15397 | if (cu->language == language_ada) |
a73c6dcd | 15398 | error (_("unexpected virtuality in component of Ada type")); |
be2daae6 | 15399 | SET_TYPE_FIELD_VIRTUAL (type, i); |
c5aa993b | 15400 | break; |
c906108c SS |
15401 | } |
15402 | } | |
c906108c SS |
15403 | } |
15404 | } | |
15405 | ||
7d27a96d TT |
15406 | /* Return true if this member function is a constructor, false |
15407 | otherwise. */ | |
15408 | ||
15409 | static int | |
15410 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
15411 | { | |
15412 | const char *fieldname; | |
fe978cb0 | 15413 | const char *type_name; |
7d27a96d TT |
15414 | int len; |
15415 | ||
15416 | if (die->parent == NULL) | |
15417 | return 0; | |
15418 | ||
15419 | if (die->parent->tag != DW_TAG_structure_type | |
15420 | && die->parent->tag != DW_TAG_union_type | |
15421 | && die->parent->tag != DW_TAG_class_type) | |
15422 | return 0; | |
15423 | ||
15424 | fieldname = dwarf2_name (die, cu); | |
fe978cb0 PA |
15425 | type_name = dwarf2_name (die->parent, cu); |
15426 | if (fieldname == NULL || type_name == NULL) | |
7d27a96d TT |
15427 | return 0; |
15428 | ||
15429 | len = strlen (fieldname); | |
fe978cb0 PA |
15430 | return (strncmp (fieldname, type_name, len) == 0 |
15431 | && (type_name[len] == '\0' || type_name[len] == '<')); | |
7d27a96d TT |
15432 | } |
15433 | ||
c906108c SS |
15434 | /* Add a member function to the proper fieldlist. */ |
15435 | ||
15436 | static void | |
107d2387 | 15437 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 15438 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 15439 | { |
518817b3 | 15440 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 15441 | struct attribute *attr; |
c906108c | 15442 | int i; |
be2daae6 | 15443 | struct fnfieldlist *flp = nullptr; |
c906108c | 15444 | struct fn_field *fnp; |
15d034d0 | 15445 | const char *fieldname; |
f792889a | 15446 | struct type *this_type; |
60d5a603 | 15447 | enum dwarf_access_attribute accessibility; |
c906108c | 15448 | |
b4ba55a1 | 15449 | if (cu->language == language_ada) |
a73c6dcd | 15450 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 15451 | |
2df3850c | 15452 | /* Get name of member function. */ |
39cbfefa DJ |
15453 | fieldname = dwarf2_name (die, cu); |
15454 | if (fieldname == NULL) | |
2df3850c | 15455 | return; |
c906108c | 15456 | |
c906108c | 15457 | /* Look up member function name in fieldlist. */ |
be2daae6 | 15458 | for (i = 0; i < fip->fnfieldlists.size (); i++) |
c906108c | 15459 | { |
27bfe10e | 15460 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
be2daae6 TT |
15461 | { |
15462 | flp = &fip->fnfieldlists[i]; | |
15463 | break; | |
15464 | } | |
c906108c SS |
15465 | } |
15466 | ||
be2daae6 TT |
15467 | /* Create a new fnfieldlist if necessary. */ |
15468 | if (flp == nullptr) | |
c906108c | 15469 | { |
be2daae6 TT |
15470 | fip->fnfieldlists.emplace_back (); |
15471 | flp = &fip->fnfieldlists.back (); | |
c906108c | 15472 | flp->name = fieldname; |
be2daae6 | 15473 | i = fip->fnfieldlists.size () - 1; |
c906108c SS |
15474 | } |
15475 | ||
be2daae6 TT |
15476 | /* Create a new member function field and add it to the vector of |
15477 | fnfieldlists. */ | |
15478 | flp->fnfields.emplace_back (); | |
15479 | fnp = &flp->fnfields.back (); | |
3da10d80 KS |
15480 | |
15481 | /* Delay processing of the physname until later. */ | |
9c37b5ae | 15482 | if (cu->language == language_cplus) |
be2daae6 TT |
15483 | add_to_method_list (type, i, flp->fnfields.size () - 1, fieldname, |
15484 | die, cu); | |
3da10d80 KS |
15485 | else |
15486 | { | |
1d06ead6 | 15487 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
15488 | fnp->physname = physname ? physname : ""; |
15489 | } | |
15490 | ||
c906108c | 15491 | fnp->type = alloc_type (objfile); |
f792889a DJ |
15492 | this_type = read_type_die (die, cu); |
15493 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 15494 | { |
f792889a | 15495 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 15496 | |
f792889a | 15497 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
15498 | of the method itself (TYPE_CODE_METHOD). */ |
15499 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
15500 | TYPE_TARGET_TYPE (this_type), |
15501 | TYPE_FIELDS (this_type), | |
15502 | TYPE_NFIELDS (this_type), | |
15503 | TYPE_VARARGS (this_type)); | |
c906108c SS |
15504 | |
15505 | /* Handle static member functions. | |
c5aa993b | 15506 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
15507 | member functions. G++ helps GDB by marking the first |
15508 | parameter for non-static member functions (which is the this | |
15509 | pointer) as artificial. We obtain this information from | |
15510 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 15511 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
15512 | fnp->voffset = VOFFSET_STATIC; |
15513 | } | |
15514 | else | |
b98664d3 | 15515 | complaint (_("member function type missing for '%s'"), |
3da10d80 | 15516 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
15517 | |
15518 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 15519 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 15520 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 15521 | |
3e43a32a MS |
15522 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
15523 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
15524 | |
15525 | /* Get accessibility. */ | |
e142c38c | 15526 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c | 15527 | if (attr) |
aead7601 | 15528 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
60d5a603 JK |
15529 | else |
15530 | accessibility = dwarf2_default_access_attribute (die, cu); | |
15531 | switch (accessibility) | |
c906108c | 15532 | { |
60d5a603 JK |
15533 | case DW_ACCESS_private: |
15534 | fnp->is_private = 1; | |
15535 | break; | |
15536 | case DW_ACCESS_protected: | |
15537 | fnp->is_protected = 1; | |
15538 | break; | |
c906108c SS |
15539 | } |
15540 | ||
b02dede2 | 15541 | /* Check for artificial methods. */ |
e142c38c | 15542 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
15543 | if (attr && DW_UNSND (attr) != 0) |
15544 | fnp->is_artificial = 1; | |
15545 | ||
7d27a96d TT |
15546 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
15547 | ||
0d564a31 | 15548 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
15549 | function. For older versions of GCC, this is an offset in the |
15550 | appropriate virtual table, as specified by DW_AT_containing_type. | |
15551 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
15552 | to the object address. */ |
15553 | ||
e142c38c | 15554 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
aec5aa8b | 15555 | if (attr) |
8e19ed76 | 15556 | { |
aec5aa8b | 15557 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 15558 | { |
aec5aa8b TT |
15559 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
15560 | { | |
15561 | /* Old-style GCC. */ | |
15562 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
15563 | } | |
15564 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
15565 | || (DW_BLOCK (attr)->size > 1 | |
15566 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
15567 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
15568 | { | |
aec5aa8b TT |
15569 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); |
15570 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
15571 | dwarf2_complex_location_expr_complaint (); | |
15572 | else | |
15573 | fnp->voffset /= cu->header.addr_size; | |
15574 | fnp->voffset += 2; | |
15575 | } | |
15576 | else | |
15577 | dwarf2_complex_location_expr_complaint (); | |
15578 | ||
15579 | if (!fnp->fcontext) | |
7e993ebf KS |
15580 | { |
15581 | /* If there is no `this' field and no DW_AT_containing_type, | |
15582 | we cannot actually find a base class context for the | |
15583 | vtable! */ | |
15584 | if (TYPE_NFIELDS (this_type) == 0 | |
15585 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) | |
15586 | { | |
b98664d3 | 15587 | complaint (_("cannot determine context for virtual member " |
9d8780f0 SM |
15588 | "function \"%s\" (offset %s)"), |
15589 | fieldname, sect_offset_str (die->sect_off)); | |
7e993ebf KS |
15590 | } |
15591 | else | |
15592 | { | |
15593 | fnp->fcontext | |
15594 | = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
15595 | } | |
15596 | } | |
aec5aa8b | 15597 | } |
3690dd37 | 15598 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 15599 | { |
4d3c2250 | 15600 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
15601 | } |
15602 | else | |
15603 | { | |
4d3c2250 KB |
15604 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
15605 | fieldname); | |
8e19ed76 | 15606 | } |
0d564a31 | 15607 | } |
d48cc9dd DJ |
15608 | else |
15609 | { | |
15610 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
15611 | if (attr && DW_UNSND (attr)) | |
15612 | { | |
15613 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
b98664d3 | 15614 | complaint (_("Member function \"%s\" (offset %s) is virtual " |
3e43a32a | 15615 | "but the vtable offset is not specified"), |
9d8780f0 | 15616 | fieldname, sect_offset_str (die->sect_off)); |
9655fd1a | 15617 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
15618 | TYPE_CPLUS_DYNAMIC (type) = 1; |
15619 | } | |
15620 | } | |
c906108c SS |
15621 | } |
15622 | ||
15623 | /* Create the vector of member function fields, and attach it to the type. */ | |
15624 | ||
15625 | static void | |
fba45db2 | 15626 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 15627 | struct dwarf2_cu *cu) |
c906108c | 15628 | { |
b4ba55a1 | 15629 | if (cu->language == language_ada) |
a73c6dcd | 15630 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 15631 | |
c906108c SS |
15632 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
15633 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
be2daae6 TT |
15634 | TYPE_ALLOC (type, |
15635 | sizeof (struct fn_fieldlist) * fip->fnfieldlists.size ()); | |
c906108c | 15636 | |
be2daae6 | 15637 | for (int i = 0; i < fip->fnfieldlists.size (); i++) |
c906108c | 15638 | { |
be2daae6 | 15639 | struct fnfieldlist &nf = fip->fnfieldlists[i]; |
c906108c | 15640 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); |
c906108c | 15641 | |
be2daae6 TT |
15642 | TYPE_FN_FIELDLIST_NAME (type, i) = nf.name; |
15643 | TYPE_FN_FIELDLIST_LENGTH (type, i) = nf.fnfields.size (); | |
c906108c | 15644 | fn_flp->fn_fields = (struct fn_field *) |
be2daae6 TT |
15645 | TYPE_ALLOC (type, sizeof (struct fn_field) * nf.fnfields.size ()); |
15646 | ||
15647 | for (int k = 0; k < nf.fnfields.size (); ++k) | |
15648 | fn_flp->fn_fields[k] = nf.fnfields[k]; | |
c906108c SS |
15649 | } |
15650 | ||
be2daae6 | 15651 | TYPE_NFN_FIELDS (type) = fip->fnfieldlists.size (); |
c906108c SS |
15652 | } |
15653 | ||
1168df01 JB |
15654 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
15655 | language, zero otherwise. */ | |
15656 | static int | |
15657 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
15658 | { | |
15659 | static const char vptr[] = "_vptr"; | |
15660 | ||
9c37b5ae TT |
15661 | /* Look for the C++ form of the vtable. */ |
15662 | if (startswith (name, vptr) && is_cplus_marker (name[sizeof (vptr) - 1])) | |
1168df01 JB |
15663 | return 1; |
15664 | ||
15665 | return 0; | |
15666 | } | |
15667 | ||
c0dd20ea | 15668 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
15669 | functions, with the ABI-specified layout. If TYPE describes |
15670 | such a structure, smash it into a member function type. | |
61049d3b DJ |
15671 | |
15672 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
15673 | This is GCC PR debug/28767. */ | |
c0dd20ea | 15674 | |
0b92b5bb TT |
15675 | static void |
15676 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 15677 | { |
09e2d7c7 | 15678 | struct type *pfn_type, *self_type, *new_type; |
c0dd20ea DJ |
15679 | |
15680 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
15681 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
15682 | return; | |
c0dd20ea DJ |
15683 | |
15684 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
15685 | if (TYPE_FIELD_NAME (type, 0) == NULL |
15686 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
15687 | || TYPE_FIELD_NAME (type, 1) == NULL | |
15688 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
15689 | return; | |
c0dd20ea DJ |
15690 | |
15691 | /* Find the type of the method. */ | |
0b92b5bb | 15692 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
15693 | if (pfn_type == NULL |
15694 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
15695 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 15696 | return; |
c0dd20ea DJ |
15697 | |
15698 | /* Look for the "this" argument. */ | |
15699 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
15700 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 15701 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 15702 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 15703 | return; |
c0dd20ea | 15704 | |
09e2d7c7 | 15705 | self_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); |
0b92b5bb | 15706 | new_type = alloc_type (objfile); |
09e2d7c7 | 15707 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
c0dd20ea DJ |
15708 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
15709 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 15710 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 15711 | } |
1168df01 | 15712 | |
2b4424c3 TT |
15713 | /* If the DIE has a DW_AT_alignment attribute, return its value, doing |
15714 | appropriate error checking and issuing complaints if there is a | |
15715 | problem. */ | |
15716 | ||
15717 | static ULONGEST | |
15718 | get_alignment (struct dwarf2_cu *cu, struct die_info *die) | |
15719 | { | |
15720 | struct attribute *attr = dwarf2_attr (die, DW_AT_alignment, cu); | |
15721 | ||
15722 | if (attr == nullptr) | |
15723 | return 0; | |
15724 | ||
15725 | if (!attr_form_is_constant (attr)) | |
15726 | { | |
b98664d3 | 15727 | complaint (_("DW_AT_alignment must have constant form" |
2b4424c3 TT |
15728 | " - DIE at %s [in module %s]"), |
15729 | sect_offset_str (die->sect_off), | |
15730 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15731 | return 0; | |
15732 | } | |
15733 | ||
15734 | ULONGEST align; | |
15735 | if (attr->form == DW_FORM_sdata) | |
15736 | { | |
15737 | LONGEST val = DW_SND (attr); | |
15738 | if (val < 0) | |
15739 | { | |
b98664d3 | 15740 | complaint (_("DW_AT_alignment value must not be negative" |
2b4424c3 TT |
15741 | " - DIE at %s [in module %s]"), |
15742 | sect_offset_str (die->sect_off), | |
15743 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15744 | return 0; | |
15745 | } | |
15746 | align = val; | |
15747 | } | |
15748 | else | |
15749 | align = DW_UNSND (attr); | |
15750 | ||
15751 | if (align == 0) | |
15752 | { | |
b98664d3 | 15753 | complaint (_("DW_AT_alignment value must not be zero" |
2b4424c3 TT |
15754 | " - DIE at %s [in module %s]"), |
15755 | sect_offset_str (die->sect_off), | |
15756 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15757 | return 0; | |
15758 | } | |
15759 | if ((align & (align - 1)) != 0) | |
15760 | { | |
b98664d3 | 15761 | complaint (_("DW_AT_alignment value must be a power of 2" |
2b4424c3 TT |
15762 | " - DIE at %s [in module %s]"), |
15763 | sect_offset_str (die->sect_off), | |
15764 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15765 | return 0; | |
15766 | } | |
15767 | ||
15768 | return align; | |
15769 | } | |
15770 | ||
15771 | /* If the DIE has a DW_AT_alignment attribute, use its value to set | |
15772 | the alignment for TYPE. */ | |
15773 | ||
15774 | static void | |
15775 | maybe_set_alignment (struct dwarf2_cu *cu, struct die_info *die, | |
15776 | struct type *type) | |
15777 | { | |
15778 | if (!set_type_align (type, get_alignment (cu, die))) | |
b98664d3 | 15779 | complaint (_("DW_AT_alignment value too large" |
2b4424c3 TT |
15780 | " - DIE at %s [in module %s]"), |
15781 | sect_offset_str (die->sect_off), | |
15782 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15783 | } | |
685b1105 | 15784 | |
c906108c | 15785 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
15786 | (definition) to create a type for the structure or union. Fill in |
15787 | the type's name and general properties; the members will not be | |
83655187 DE |
15788 | processed until process_structure_scope. A symbol table entry for |
15789 | the type will also not be done until process_structure_scope (assuming | |
15790 | the type has a name). | |
c906108c | 15791 | |
c767944b DJ |
15792 | NOTE: we need to call these functions regardless of whether or not the |
15793 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 15794 | structure or union. This gets the type entered into our set of |
83655187 | 15795 | user defined types. */ |
c906108c | 15796 | |
f792889a | 15797 | static struct type * |
134d01f1 | 15798 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15799 | { |
518817b3 | 15800 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c SS |
15801 | struct type *type; |
15802 | struct attribute *attr; | |
15d034d0 | 15803 | const char *name; |
c906108c | 15804 | |
348e048f DE |
15805 | /* If the definition of this type lives in .debug_types, read that type. |
15806 | Don't follow DW_AT_specification though, that will take us back up | |
15807 | the chain and we want to go down. */ | |
45e58e77 | 15808 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
15809 | if (attr) |
15810 | { | |
ac9ec31b | 15811 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 15812 | |
ac9ec31b | 15813 | /* The type's CU may not be the same as CU. |
02142a6c | 15814 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
15815 | return set_die_type (die, type, cu); |
15816 | } | |
15817 | ||
c0dd20ea | 15818 | type = alloc_type (objfile); |
c906108c | 15819 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 15820 | |
39cbfefa DJ |
15821 | name = dwarf2_name (die, cu); |
15822 | if (name != NULL) | |
c906108c | 15823 | { |
987504bb | 15824 | if (cu->language == language_cplus |
c44af4eb TT |
15825 | || cu->language == language_d |
15826 | || cu->language == language_rust) | |
63d06c5c | 15827 | { |
15d034d0 | 15828 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
15829 | |
15830 | /* dwarf2_full_name might have already finished building the DIE's | |
15831 | type. If so, there is no need to continue. */ | |
15832 | if (get_die_type (die, cu) != NULL) | |
15833 | return get_die_type (die, cu); | |
15834 | ||
e86ca25f | 15835 | TYPE_NAME (type) = full_name; |
63d06c5c DC |
15836 | } |
15837 | else | |
15838 | { | |
d8151005 DJ |
15839 | /* The name is already allocated along with this objfile, so |
15840 | we don't need to duplicate it for the type. */ | |
e86ca25f | 15841 | TYPE_NAME (type) = name; |
63d06c5c | 15842 | } |
c906108c SS |
15843 | } |
15844 | ||
15845 | if (die->tag == DW_TAG_structure_type) | |
15846 | { | |
15847 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
15848 | } | |
15849 | else if (die->tag == DW_TAG_union_type) | |
15850 | { | |
15851 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
15852 | } | |
2ddeaf8a TT |
15853 | else if (die->tag == DW_TAG_variant_part) |
15854 | { | |
15855 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
15856 | TYPE_FLAG_DISCRIMINATED_UNION (type) = 1; | |
15857 | } | |
c906108c SS |
15858 | else |
15859 | { | |
4753d33b | 15860 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
c906108c SS |
15861 | } |
15862 | ||
0cc2414c TT |
15863 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
15864 | TYPE_DECLARED_CLASS (type) = 1; | |
15865 | ||
e142c38c | 15866 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
15867 | if (attr) |
15868 | { | |
155bfbd3 JB |
15869 | if (attr_form_is_constant (attr)) |
15870 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
15871 | else | |
15872 | { | |
15873 | /* For the moment, dynamic type sizes are not supported | |
15874 | by GDB's struct type. The actual size is determined | |
15875 | on-demand when resolving the type of a given object, | |
15876 | so set the type's length to zero for now. Otherwise, | |
15877 | we record an expression as the length, and that expression | |
15878 | could lead to a very large value, which could eventually | |
15879 | lead to us trying to allocate that much memory when creating | |
15880 | a value of that type. */ | |
15881 | TYPE_LENGTH (type) = 0; | |
15882 | } | |
c906108c SS |
15883 | } |
15884 | else | |
15885 | { | |
15886 | TYPE_LENGTH (type) = 0; | |
15887 | } | |
15888 | ||
2b4424c3 TT |
15889 | maybe_set_alignment (cu, die, type); |
15890 | ||
5230b05a | 15891 | if (producer_is_icc_lt_14 (cu) && (TYPE_LENGTH (type) == 0)) |
685b1105 | 15892 | { |
5230b05a WT |
15893 | /* ICC<14 does not output the required DW_AT_declaration on |
15894 | incomplete types, but gives them a size of zero. */ | |
422b1cb0 | 15895 | TYPE_STUB (type) = 1; |
685b1105 JK |
15896 | } |
15897 | else | |
15898 | TYPE_STUB_SUPPORTED (type) = 1; | |
15899 | ||
dc718098 | 15900 | if (die_is_declaration (die, cu)) |
876cecd0 | 15901 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
15902 | else if (attr == NULL && die->child == NULL |
15903 | && producer_is_realview (cu->producer)) | |
15904 | /* RealView does not output the required DW_AT_declaration | |
15905 | on incomplete types. */ | |
15906 | TYPE_STUB (type) = 1; | |
dc718098 | 15907 | |
c906108c SS |
15908 | /* We need to add the type field to the die immediately so we don't |
15909 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 15910 | type within the structure itself. */ |
1c379e20 | 15911 | set_die_type (die, type, cu); |
c906108c | 15912 | |
7e314c57 JK |
15913 | /* set_die_type should be already done. */ |
15914 | set_descriptive_type (type, die, cu); | |
15915 | ||
c767944b DJ |
15916 | return type; |
15917 | } | |
15918 | ||
2ddeaf8a TT |
15919 | /* A helper for process_structure_scope that handles a single member |
15920 | DIE. */ | |
15921 | ||
15922 | static void | |
15923 | handle_struct_member_die (struct die_info *child_die, struct type *type, | |
15924 | struct field_info *fi, | |
15925 | std::vector<struct symbol *> *template_args, | |
15926 | struct dwarf2_cu *cu) | |
15927 | { | |
15928 | if (child_die->tag == DW_TAG_member | |
15929 | || child_die->tag == DW_TAG_variable | |
15930 | || child_die->tag == DW_TAG_variant_part) | |
15931 | { | |
15932 | /* NOTE: carlton/2002-11-05: A C++ static data member | |
15933 | should be a DW_TAG_member that is a declaration, but | |
15934 | all versions of G++ as of this writing (so through at | |
15935 | least 3.2.1) incorrectly generate DW_TAG_variable | |
15936 | tags for them instead. */ | |
15937 | dwarf2_add_field (fi, child_die, cu); | |
15938 | } | |
15939 | else if (child_die->tag == DW_TAG_subprogram) | |
15940 | { | |
15941 | /* Rust doesn't have member functions in the C++ sense. | |
15942 | However, it does emit ordinary functions as children | |
15943 | of a struct DIE. */ | |
15944 | if (cu->language == language_rust) | |
15945 | read_func_scope (child_die, cu); | |
15946 | else | |
15947 | { | |
15948 | /* C++ member function. */ | |
15949 | dwarf2_add_member_fn (fi, child_die, type, cu); | |
15950 | } | |
15951 | } | |
15952 | else if (child_die->tag == DW_TAG_inheritance) | |
15953 | { | |
15954 | /* C++ base class field. */ | |
15955 | dwarf2_add_field (fi, child_die, cu); | |
15956 | } | |
15957 | else if (type_can_define_types (child_die)) | |
15958 | dwarf2_add_type_defn (fi, child_die, cu); | |
15959 | else if (child_die->tag == DW_TAG_template_type_param | |
15960 | || child_die->tag == DW_TAG_template_value_param) | |
15961 | { | |
15962 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
15963 | ||
15964 | if (arg != NULL) | |
15965 | template_args->push_back (arg); | |
15966 | } | |
15967 | else if (child_die->tag == DW_TAG_variant) | |
15968 | { | |
15969 | /* In a variant we want to get the discriminant and also add a | |
15970 | field for our sole member child. */ | |
15971 | struct attribute *discr = dwarf2_attr (child_die, DW_AT_discr_value, cu); | |
15972 | ||
bde09ab7 | 15973 | for (die_info *variant_child = child_die->child; |
2ddeaf8a TT |
15974 | variant_child != NULL; |
15975 | variant_child = sibling_die (variant_child)) | |
15976 | { | |
15977 | if (variant_child->tag == DW_TAG_member) | |
15978 | { | |
15979 | handle_struct_member_die (variant_child, type, fi, | |
15980 | template_args, cu); | |
15981 | /* Only handle the one. */ | |
15982 | break; | |
15983 | } | |
15984 | } | |
15985 | ||
15986 | /* We don't handle this but we might as well report it if we see | |
15987 | it. */ | |
15988 | if (dwarf2_attr (child_die, DW_AT_discr_list, cu) != nullptr) | |
b98664d3 | 15989 | complaint (_("DW_AT_discr_list is not supported yet" |
2ddeaf8a TT |
15990 | " - DIE at %s [in module %s]"), |
15991 | sect_offset_str (child_die->sect_off), | |
15992 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15993 | ||
15994 | /* The first field was just added, so we can stash the | |
15995 | discriminant there. */ | |
be2daae6 | 15996 | gdb_assert (!fi->fields.empty ()); |
2ddeaf8a | 15997 | if (discr == NULL) |
be2daae6 | 15998 | fi->fields.back ().variant.default_branch = true; |
2ddeaf8a | 15999 | else |
be2daae6 | 16000 | fi->fields.back ().variant.discriminant_value = DW_UNSND (discr); |
2ddeaf8a TT |
16001 | } |
16002 | } | |
16003 | ||
c767944b DJ |
16004 | /* Finish creating a structure or union type, including filling in |
16005 | its members and creating a symbol for it. */ | |
16006 | ||
16007 | static void | |
16008 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
16009 | { | |
518817b3 | 16010 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
ca040673 | 16011 | struct die_info *child_die; |
c767944b DJ |
16012 | struct type *type; |
16013 | ||
16014 | type = get_die_type (die, cu); | |
16015 | if (type == NULL) | |
16016 | type = read_structure_type (die, cu); | |
16017 | ||
2ddeaf8a TT |
16018 | /* When reading a DW_TAG_variant_part, we need to notice when we |
16019 | read the discriminant member, so we can record it later in the | |
16020 | discriminant_info. */ | |
16021 | bool is_variant_part = TYPE_FLAG_DISCRIMINATED_UNION (type); | |
16022 | sect_offset discr_offset; | |
3e1d3d8c | 16023 | bool has_template_parameters = false; |
2ddeaf8a TT |
16024 | |
16025 | if (is_variant_part) | |
16026 | { | |
16027 | struct attribute *discr = dwarf2_attr (die, DW_AT_discr, cu); | |
16028 | if (discr == NULL) | |
16029 | { | |
16030 | /* Maybe it's a univariant form, an extension we support. | |
16031 | In this case arrange not to check the offset. */ | |
16032 | is_variant_part = false; | |
16033 | } | |
16034 | else if (attr_form_is_ref (discr)) | |
16035 | { | |
16036 | struct dwarf2_cu *target_cu = cu; | |
16037 | struct die_info *target_die = follow_die_ref (die, discr, &target_cu); | |
16038 | ||
16039 | discr_offset = target_die->sect_off; | |
16040 | } | |
16041 | else | |
16042 | { | |
b98664d3 | 16043 | complaint (_("DW_AT_discr does not have DIE reference form" |
2ddeaf8a TT |
16044 | " - DIE at %s [in module %s]"), |
16045 | sect_offset_str (die->sect_off), | |
16046 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
16047 | is_variant_part = false; | |
16048 | } | |
16049 | } | |
16050 | ||
e142c38c | 16051 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
16052 | { |
16053 | struct field_info fi; | |
2f4732b0 | 16054 | std::vector<struct symbol *> template_args; |
c906108c | 16055 | |
639d11d3 | 16056 | child_die = die->child; |
c906108c SS |
16057 | |
16058 | while (child_die && child_die->tag) | |
16059 | { | |
2ddeaf8a | 16060 | handle_struct_member_die (child_die, type, &fi, &template_args, cu); |
34eaf542 | 16061 | |
2ddeaf8a | 16062 | if (is_variant_part && discr_offset == child_die->sect_off) |
be2daae6 | 16063 | fi.fields.back ().variant.is_discriminant = true; |
34eaf542 | 16064 | |
c906108c SS |
16065 | child_die = sibling_die (child_die); |
16066 | } | |
16067 | ||
34eaf542 | 16068 | /* Attach template arguments to type. */ |
2f4732b0 | 16069 | if (!template_args.empty ()) |
34eaf542 | 16070 | { |
3e1d3d8c | 16071 | has_template_parameters = true; |
34eaf542 | 16072 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
2f4732b0 | 16073 | TYPE_N_TEMPLATE_ARGUMENTS (type) = template_args.size (); |
34eaf542 | 16074 | TYPE_TEMPLATE_ARGUMENTS (type) |
8d749320 SM |
16075 | = XOBNEWVEC (&objfile->objfile_obstack, |
16076 | struct symbol *, | |
16077 | TYPE_N_TEMPLATE_ARGUMENTS (type)); | |
34eaf542 | 16078 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
2f4732b0 | 16079 | template_args.data (), |
34eaf542 TT |
16080 | (TYPE_N_TEMPLATE_ARGUMENTS (type) |
16081 | * sizeof (struct symbol *))); | |
34eaf542 TT |
16082 | } |
16083 | ||
c906108c SS |
16084 | /* Attach fields and member functions to the type. */ |
16085 | if (fi.nfields) | |
e7c27a73 | 16086 | dwarf2_attach_fields_to_type (&fi, type, cu); |
be2daae6 | 16087 | if (!fi.fnfieldlists.empty ()) |
c906108c | 16088 | { |
e7c27a73 | 16089 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 16090 | |
c5aa993b | 16091 | /* Get the type which refers to the base class (possibly this |
c906108c | 16092 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
16093 | class from the DW_AT_containing_type attribute. This use of |
16094 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 16095 | |
e142c38c | 16096 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 16097 | { |
e7c27a73 | 16098 | struct type *t = die_containing_type (die, cu); |
c906108c | 16099 | |
ae6ae975 | 16100 | set_type_vptr_basetype (type, t); |
c906108c SS |
16101 | if (type == t) |
16102 | { | |
c906108c SS |
16103 | int i; |
16104 | ||
16105 | /* Our own class provides vtbl ptr. */ | |
16106 | for (i = TYPE_NFIELDS (t) - 1; | |
16107 | i >= TYPE_N_BASECLASSES (t); | |
16108 | --i) | |
16109 | { | |
0d5cff50 | 16110 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 16111 | |
1168df01 | 16112 | if (is_vtable_name (fieldname, cu)) |
c906108c | 16113 | { |
ae6ae975 | 16114 | set_type_vptr_fieldno (type, i); |
c906108c SS |
16115 | break; |
16116 | } | |
16117 | } | |
16118 | ||
16119 | /* Complain if virtual function table field not found. */ | |
16120 | if (i < TYPE_N_BASECLASSES (t)) | |
b98664d3 | 16121 | complaint (_("virtual function table pointer " |
3e43a32a | 16122 | "not found when defining class '%s'"), |
e86ca25f | 16123 | TYPE_NAME (type) ? TYPE_NAME (type) : ""); |
c906108c SS |
16124 | } |
16125 | else | |
16126 | { | |
ae6ae975 | 16127 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
c906108c SS |
16128 | } |
16129 | } | |
f6235d4c | 16130 | else if (cu->producer |
61012eef | 16131 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
f6235d4c EZ |
16132 | { |
16133 | /* The IBM XLC compiler does not provide direct indication | |
16134 | of the containing type, but the vtable pointer is | |
16135 | always named __vfp. */ | |
16136 | ||
16137 | int i; | |
16138 | ||
16139 | for (i = TYPE_NFIELDS (type) - 1; | |
16140 | i >= TYPE_N_BASECLASSES (type); | |
16141 | --i) | |
16142 | { | |
16143 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
16144 | { | |
ae6ae975 DE |
16145 | set_type_vptr_fieldno (type, i); |
16146 | set_type_vptr_basetype (type, type); | |
f6235d4c EZ |
16147 | break; |
16148 | } | |
16149 | } | |
16150 | } | |
c906108c | 16151 | } |
98751a41 JK |
16152 | |
16153 | /* Copy fi.typedef_field_list linked list elements content into the | |
16154 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
be2daae6 | 16155 | if (!fi.typedef_field_list.empty ()) |
98751a41 | 16156 | { |
be2daae6 | 16157 | int count = fi.typedef_field_list.size (); |
98751a41 | 16158 | |
a0d7a4ff | 16159 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 | 16160 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
883fd55a | 16161 | = ((struct decl_field *) |
be2daae6 TT |
16162 | TYPE_ALLOC (type, |
16163 | sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * count)); | |
16164 | TYPE_TYPEDEF_FIELD_COUNT (type) = count; | |
6e70227d | 16165 | |
be2daae6 TT |
16166 | for (int i = 0; i < fi.typedef_field_list.size (); ++i) |
16167 | TYPE_TYPEDEF_FIELD (type, i) = fi.typedef_field_list[i]; | |
98751a41 | 16168 | } |
c767944b | 16169 | |
883fd55a KS |
16170 | /* Copy fi.nested_types_list linked list elements content into the |
16171 | allocated array TYPE_NESTED_TYPES_ARRAY (type). */ | |
be2daae6 | 16172 | if (!fi.nested_types_list.empty () && cu->language != language_ada) |
883fd55a | 16173 | { |
be2daae6 | 16174 | int count = fi.nested_types_list.size (); |
883fd55a KS |
16175 | |
16176 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
16177 | TYPE_NESTED_TYPES_ARRAY (type) | |
16178 | = ((struct decl_field *) | |
be2daae6 TT |
16179 | TYPE_ALLOC (type, sizeof (struct decl_field) * count)); |
16180 | TYPE_NESTED_TYPES_COUNT (type) = count; | |
883fd55a | 16181 | |
be2daae6 TT |
16182 | for (int i = 0; i < fi.nested_types_list.size (); ++i) |
16183 | TYPE_NESTED_TYPES_FIELD (type, i) = fi.nested_types_list[i]; | |
883fd55a | 16184 | } |
c906108c | 16185 | } |
63d06c5c | 16186 | |
bb5ed363 | 16187 | quirk_gcc_member_function_pointer (type, objfile); |
c9317f21 TT |
16188 | if (cu->language == language_rust && die->tag == DW_TAG_union_type) |
16189 | cu->rust_unions.push_back (type); | |
0b92b5bb | 16190 | |
90aeadfc DC |
16191 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
16192 | snapshots) has been known to create a die giving a declaration | |
16193 | for a class that has, as a child, a die giving a definition for a | |
16194 | nested class. So we have to process our children even if the | |
16195 | current die is a declaration. Normally, of course, a declaration | |
16196 | won't have any children at all. */ | |
134d01f1 | 16197 | |
ca040673 DE |
16198 | child_die = die->child; |
16199 | ||
90aeadfc DC |
16200 | while (child_die != NULL && child_die->tag) |
16201 | { | |
16202 | if (child_die->tag == DW_TAG_member | |
16203 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
16204 | || child_die->tag == DW_TAG_inheritance |
16205 | || child_die->tag == DW_TAG_template_value_param | |
16206 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 16207 | { |
90aeadfc | 16208 | /* Do nothing. */ |
134d01f1 | 16209 | } |
90aeadfc DC |
16210 | else |
16211 | process_die (child_die, cu); | |
134d01f1 | 16212 | |
90aeadfc | 16213 | child_die = sibling_die (child_die); |
134d01f1 DJ |
16214 | } |
16215 | ||
fa4028e9 JB |
16216 | /* Do not consider external references. According to the DWARF standard, |
16217 | these DIEs are identified by the fact that they have no byte_size | |
16218 | attribute, and a declaration attribute. */ | |
16219 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
16220 | || !die_is_declaration (die, cu)) | |
3e1d3d8c TT |
16221 | { |
16222 | struct symbol *sym = new_symbol (die, type, cu); | |
16223 | ||
16224 | if (has_template_parameters) | |
16225 | { | |
a776957c TT |
16226 | struct symtab *symtab; |
16227 | if (sym != nullptr) | |
16228 | symtab = symbol_symtab (sym); | |
16229 | else if (cu->line_header != nullptr) | |
16230 | { | |
16231 | /* Any related symtab will do. */ | |
16232 | symtab | |
16233 | = cu->line_header->file_name_at (file_name_index (1))->symtab; | |
16234 | } | |
16235 | else | |
16236 | { | |
16237 | symtab = nullptr; | |
16238 | complaint (_("could not find suitable " | |
16239 | "symtab for template parameter" | |
16240 | " - DIE at %s [in module %s]"), | |
16241 | sect_offset_str (die->sect_off), | |
16242 | objfile_name (objfile)); | |
16243 | } | |
16244 | ||
16245 | if (symtab != nullptr) | |
16246 | { | |
16247 | /* Make sure that the symtab is set on the new symbols. | |
16248 | Even though they don't appear in this symtab directly, | |
16249 | other parts of gdb assume that symbols do, and this is | |
16250 | reasonably true. */ | |
16251 | for (int i = 0; i < TYPE_N_TEMPLATE_ARGUMENTS (type); ++i) | |
16252 | symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type, i), symtab); | |
16253 | } | |
3e1d3d8c TT |
16254 | } |
16255 | } | |
134d01f1 DJ |
16256 | } |
16257 | ||
55426c9d JB |
16258 | /* Assuming DIE is an enumeration type, and TYPE is its associated type, |
16259 | update TYPE using some information only available in DIE's children. */ | |
16260 | ||
16261 | static void | |
16262 | update_enumeration_type_from_children (struct die_info *die, | |
16263 | struct type *type, | |
16264 | struct dwarf2_cu *cu) | |
16265 | { | |
60f7655a | 16266 | struct die_info *child_die; |
55426c9d JB |
16267 | int unsigned_enum = 1; |
16268 | int flag_enum = 1; | |
16269 | ULONGEST mask = 0; | |
55426c9d | 16270 | |
8268c778 | 16271 | auto_obstack obstack; |
55426c9d | 16272 | |
60f7655a DE |
16273 | for (child_die = die->child; |
16274 | child_die != NULL && child_die->tag; | |
16275 | child_die = sibling_die (child_die)) | |
55426c9d JB |
16276 | { |
16277 | struct attribute *attr; | |
16278 | LONGEST value; | |
16279 | const gdb_byte *bytes; | |
16280 | struct dwarf2_locexpr_baton *baton; | |
16281 | const char *name; | |
60f7655a | 16282 | |
55426c9d JB |
16283 | if (child_die->tag != DW_TAG_enumerator) |
16284 | continue; | |
16285 | ||
16286 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
16287 | if (attr == NULL) | |
16288 | continue; | |
16289 | ||
16290 | name = dwarf2_name (child_die, cu); | |
16291 | if (name == NULL) | |
16292 | name = "<anonymous enumerator>"; | |
16293 | ||
16294 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
16295 | &value, &bytes, &baton); | |
16296 | if (value < 0) | |
16297 | { | |
16298 | unsigned_enum = 0; | |
16299 | flag_enum = 0; | |
16300 | } | |
16301 | else if ((mask & value) != 0) | |
16302 | flag_enum = 0; | |
16303 | else | |
16304 | mask |= value; | |
16305 | ||
16306 | /* If we already know that the enum type is neither unsigned, nor | |
16307 | a flag type, no need to look at the rest of the enumerates. */ | |
16308 | if (!unsigned_enum && !flag_enum) | |
16309 | break; | |
55426c9d JB |
16310 | } |
16311 | ||
16312 | if (unsigned_enum) | |
16313 | TYPE_UNSIGNED (type) = 1; | |
16314 | if (flag_enum) | |
16315 | TYPE_FLAG_ENUM (type) = 1; | |
55426c9d JB |
16316 | } |
16317 | ||
134d01f1 DJ |
16318 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
16319 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 16320 | |
f792889a | 16321 | static struct type * |
134d01f1 | 16322 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16323 | { |
518817b3 | 16324 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 16325 | struct type *type; |
c906108c | 16326 | struct attribute *attr; |
0114d602 | 16327 | const char *name; |
134d01f1 | 16328 | |
348e048f DE |
16329 | /* If the definition of this type lives in .debug_types, read that type. |
16330 | Don't follow DW_AT_specification though, that will take us back up | |
16331 | the chain and we want to go down. */ | |
45e58e77 | 16332 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
16333 | if (attr) |
16334 | { | |
ac9ec31b | 16335 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 16336 | |
ac9ec31b | 16337 | /* The type's CU may not be the same as CU. |
02142a6c | 16338 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
16339 | return set_die_type (die, type, cu); |
16340 | } | |
16341 | ||
c906108c SS |
16342 | type = alloc_type (objfile); |
16343 | ||
16344 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 16345 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 16346 | if (name != NULL) |
e86ca25f | 16347 | TYPE_NAME (type) = name; |
c906108c | 16348 | |
0626fc76 TT |
16349 | attr = dwarf2_attr (die, DW_AT_type, cu); |
16350 | if (attr != NULL) | |
16351 | { | |
16352 | struct type *underlying_type = die_type (die, cu); | |
16353 | ||
16354 | TYPE_TARGET_TYPE (type) = underlying_type; | |
16355 | } | |
16356 | ||
e142c38c | 16357 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
16358 | if (attr) |
16359 | { | |
16360 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
16361 | } | |
16362 | else | |
16363 | { | |
16364 | TYPE_LENGTH (type) = 0; | |
16365 | } | |
16366 | ||
2b4424c3 TT |
16367 | maybe_set_alignment (cu, die, type); |
16368 | ||
137033e9 JB |
16369 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
16370 | declared as private in the package spec, and then defined only | |
16371 | inside the package body. Such types are known as Taft Amendment | |
16372 | Types. When another package uses such a type, an incomplete DIE | |
16373 | may be generated by the compiler. */ | |
02eb380e | 16374 | if (die_is_declaration (die, cu)) |
876cecd0 | 16375 | TYPE_STUB (type) = 1; |
02eb380e | 16376 | |
0626fc76 TT |
16377 | /* Finish the creation of this type by using the enum's children. |
16378 | We must call this even when the underlying type has been provided | |
16379 | so that we can determine if we're looking at a "flag" enum. */ | |
55426c9d JB |
16380 | update_enumeration_type_from_children (die, type, cu); |
16381 | ||
0626fc76 TT |
16382 | /* If this type has an underlying type that is not a stub, then we |
16383 | may use its attributes. We always use the "unsigned" attribute | |
16384 | in this situation, because ordinarily we guess whether the type | |
16385 | is unsigned -- but the guess can be wrong and the underlying type | |
16386 | can tell us the reality. However, we defer to a local size | |
16387 | attribute if one exists, because this lets the compiler override | |
16388 | the underlying type if needed. */ | |
16389 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type))) | |
16390 | { | |
16391 | TYPE_UNSIGNED (type) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)); | |
16392 | if (TYPE_LENGTH (type) == 0) | |
16393 | TYPE_LENGTH (type) = TYPE_LENGTH (TYPE_TARGET_TYPE (type)); | |
2b4424c3 TT |
16394 | if (TYPE_RAW_ALIGN (type) == 0 |
16395 | && TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type)) != 0) | |
16396 | set_type_align (type, TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type))); | |
0626fc76 TT |
16397 | } |
16398 | ||
3d567982 TT |
16399 | TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu); |
16400 | ||
f792889a | 16401 | return set_die_type (die, type, cu); |
134d01f1 DJ |
16402 | } |
16403 | ||
16404 | /* Given a pointer to a die which begins an enumeration, process all | |
16405 | the dies that define the members of the enumeration, and create the | |
16406 | symbol for the enumeration type. | |
16407 | ||
16408 | NOTE: We reverse the order of the element list. */ | |
16409 | ||
16410 | static void | |
16411 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
16412 | { | |
f792889a | 16413 | struct type *this_type; |
134d01f1 | 16414 | |
f792889a DJ |
16415 | this_type = get_die_type (die, cu); |
16416 | if (this_type == NULL) | |
16417 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 16418 | |
639d11d3 | 16419 | if (die->child != NULL) |
c906108c | 16420 | { |
9dc481d3 DE |
16421 | struct die_info *child_die; |
16422 | struct symbol *sym; | |
16423 | struct field *fields = NULL; | |
16424 | int num_fields = 0; | |
15d034d0 | 16425 | const char *name; |
9dc481d3 | 16426 | |
639d11d3 | 16427 | child_die = die->child; |
c906108c SS |
16428 | while (child_die && child_die->tag) |
16429 | { | |
16430 | if (child_die->tag != DW_TAG_enumerator) | |
16431 | { | |
e7c27a73 | 16432 | process_die (child_die, cu); |
c906108c SS |
16433 | } |
16434 | else | |
16435 | { | |
39cbfefa DJ |
16436 | name = dwarf2_name (child_die, cu); |
16437 | if (name) | |
c906108c | 16438 | { |
f792889a | 16439 | sym = new_symbol (child_die, this_type, cu); |
c906108c SS |
16440 | |
16441 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
16442 | { | |
16443 | fields = (struct field *) | |
16444 | xrealloc (fields, | |
16445 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 16446 | * sizeof (struct field)); |
c906108c SS |
16447 | } |
16448 | ||
3567439c | 16449 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c | 16450 | FIELD_TYPE (fields[num_fields]) = NULL; |
14e75d8e | 16451 | SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym)); |
c906108c SS |
16452 | FIELD_BITSIZE (fields[num_fields]) = 0; |
16453 | ||
16454 | num_fields++; | |
16455 | } | |
16456 | } | |
16457 | ||
16458 | child_die = sibling_die (child_die); | |
16459 | } | |
16460 | ||
16461 | if (num_fields) | |
16462 | { | |
f792889a DJ |
16463 | TYPE_NFIELDS (this_type) = num_fields; |
16464 | TYPE_FIELDS (this_type) = (struct field *) | |
16465 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
16466 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 16467 | sizeof (struct field) * num_fields); |
b8c9b27d | 16468 | xfree (fields); |
c906108c | 16469 | } |
c906108c | 16470 | } |
134d01f1 | 16471 | |
6c83ed52 TT |
16472 | /* If we are reading an enum from a .debug_types unit, and the enum |
16473 | is a declaration, and the enum is not the signatured type in the | |
16474 | unit, then we do not want to add a symbol for it. Adding a | |
16475 | symbol would in some cases obscure the true definition of the | |
16476 | enum, giving users an incomplete type when the definition is | |
16477 | actually available. Note that we do not want to do this for all | |
16478 | enums which are just declarations, because C++0x allows forward | |
16479 | enum declarations. */ | |
3019eac3 | 16480 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
16481 | && die_is_declaration (die, cu)) |
16482 | { | |
52dc124a | 16483 | struct signatured_type *sig_type; |
6c83ed52 | 16484 | |
c0f78cd4 | 16485 | sig_type = (struct signatured_type *) cu->per_cu; |
9c541725 PA |
16486 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
16487 | if (sig_type->type_offset_in_section != die->sect_off) | |
6c83ed52 TT |
16488 | return; |
16489 | } | |
16490 | ||
f792889a | 16491 | new_symbol (die, this_type, cu); |
c906108c SS |
16492 | } |
16493 | ||
16494 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
16495 | the DIE's type field. For now, this only handles one dimensional | |
16496 | arrays. */ | |
16497 | ||
f792889a | 16498 | static struct type * |
e7c27a73 | 16499 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16500 | { |
518817b3 | 16501 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 16502 | struct die_info *child_die; |
7e314c57 | 16503 | struct type *type; |
c906108c | 16504 | struct type *element_type, *range_type, *index_type; |
c906108c | 16505 | struct attribute *attr; |
15d034d0 | 16506 | const char *name; |
a405673c | 16507 | struct dynamic_prop *byte_stride_prop = NULL; |
dc53a7ad | 16508 | unsigned int bit_stride = 0; |
c906108c | 16509 | |
e7c27a73 | 16510 | element_type = die_type (die, cu); |
c906108c | 16511 | |
7e314c57 JK |
16512 | /* The die_type call above may have already set the type for this DIE. */ |
16513 | type = get_die_type (die, cu); | |
16514 | if (type) | |
16515 | return type; | |
16516 | ||
dc53a7ad JB |
16517 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
16518 | if (attr != NULL) | |
a405673c JB |
16519 | { |
16520 | int stride_ok; | |
9a49df9d AB |
16521 | struct type *prop_type |
16522 | = dwarf2_per_cu_addr_sized_int_type (cu->per_cu, false); | |
a405673c JB |
16523 | |
16524 | byte_stride_prop | |
16525 | = (struct dynamic_prop *) alloca (sizeof (struct dynamic_prop)); | |
9a49df9d AB |
16526 | stride_ok = attr_to_dynamic_prop (attr, die, cu, byte_stride_prop, |
16527 | prop_type); | |
a405673c JB |
16528 | if (!stride_ok) |
16529 | { | |
b98664d3 | 16530 | complaint (_("unable to read array DW_AT_byte_stride " |
9d8780f0 SM |
16531 | " - DIE at %s [in module %s]"), |
16532 | sect_offset_str (die->sect_off), | |
518817b3 | 16533 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
a405673c JB |
16534 | /* Ignore this attribute. We will likely not be able to print |
16535 | arrays of this type correctly, but there is little we can do | |
16536 | to help if we cannot read the attribute's value. */ | |
16537 | byte_stride_prop = NULL; | |
16538 | } | |
16539 | } | |
dc53a7ad JB |
16540 | |
16541 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
16542 | if (attr != NULL) | |
16543 | bit_stride = DW_UNSND (attr); | |
16544 | ||
c906108c SS |
16545 | /* Irix 6.2 native cc creates array types without children for |
16546 | arrays with unspecified length. */ | |
639d11d3 | 16547 | if (die->child == NULL) |
c906108c | 16548 | { |
46bf5051 | 16549 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 16550 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad | 16551 | type = create_array_type_with_stride (NULL, element_type, range_type, |
a405673c | 16552 | byte_stride_prop, bit_stride); |
f792889a | 16553 | return set_die_type (die, type, cu); |
c906108c SS |
16554 | } |
16555 | ||
791afaa2 | 16556 | std::vector<struct type *> range_types; |
639d11d3 | 16557 | child_die = die->child; |
c906108c SS |
16558 | while (child_die && child_die->tag) |
16559 | { | |
16560 | if (child_die->tag == DW_TAG_subrange_type) | |
16561 | { | |
f792889a | 16562 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 16563 | |
f792889a | 16564 | if (child_type != NULL) |
a02abb62 | 16565 | { |
0963b4bd MS |
16566 | /* The range type was succesfully read. Save it for the |
16567 | array type creation. */ | |
791afaa2 | 16568 | range_types.push_back (child_type); |
a02abb62 | 16569 | } |
c906108c SS |
16570 | } |
16571 | child_die = sibling_die (child_die); | |
16572 | } | |
16573 | ||
16574 | /* Dwarf2 dimensions are output from left to right, create the | |
16575 | necessary array types in backwards order. */ | |
7ca2d3a3 | 16576 | |
c906108c | 16577 | type = element_type; |
7ca2d3a3 DL |
16578 | |
16579 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
16580 | { | |
16581 | int i = 0; | |
9a619af0 | 16582 | |
791afaa2 | 16583 | while (i < range_types.size ()) |
dc53a7ad | 16584 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
a405673c | 16585 | byte_stride_prop, bit_stride); |
7ca2d3a3 DL |
16586 | } |
16587 | else | |
16588 | { | |
791afaa2 | 16589 | size_t ndim = range_types.size (); |
7ca2d3a3 | 16590 | while (ndim-- > 0) |
dc53a7ad | 16591 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
a405673c | 16592 | byte_stride_prop, bit_stride); |
7ca2d3a3 | 16593 | } |
c906108c | 16594 | |
f5f8a009 EZ |
16595 | /* Understand Dwarf2 support for vector types (like they occur on |
16596 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
16597 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
16598 | custom vendor extension. The main difference between a regular | |
16599 | array and the vector variant is that vectors are passed by value | |
16600 | to functions. */ | |
e142c38c | 16601 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 16602 | if (attr) |
ea37ba09 | 16603 | make_vector_type (type); |
f5f8a009 | 16604 | |
dbc98a8b KW |
16605 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
16606 | implementation may choose to implement triple vectors using this | |
16607 | attribute. */ | |
16608 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
16609 | if (attr) | |
16610 | { | |
16611 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
16612 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
16613 | else | |
b98664d3 | 16614 | complaint (_("DW_AT_byte_size for array type smaller " |
3e43a32a | 16615 | "than the total size of elements")); |
dbc98a8b KW |
16616 | } |
16617 | ||
39cbfefa DJ |
16618 | name = dwarf2_name (die, cu); |
16619 | if (name) | |
16620 | TYPE_NAME (type) = name; | |
6e70227d | 16621 | |
2b4424c3 TT |
16622 | maybe_set_alignment (cu, die, type); |
16623 | ||
0963b4bd | 16624 | /* Install the type in the die. */ |
7e314c57 JK |
16625 | set_die_type (die, type, cu); |
16626 | ||
16627 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
16628 | set_descriptive_type (type, die, cu); |
16629 | ||
7e314c57 | 16630 | return type; |
c906108c SS |
16631 | } |
16632 | ||
7ca2d3a3 | 16633 | static enum dwarf_array_dim_ordering |
6e70227d | 16634 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
16635 | { |
16636 | struct attribute *attr; | |
16637 | ||
16638 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
16639 | ||
aead7601 SM |
16640 | if (attr) |
16641 | return (enum dwarf_array_dim_ordering) DW_SND (attr); | |
7ca2d3a3 | 16642 | |
0963b4bd MS |
16643 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
16644 | opposite order to the dwarf2 specification, but data is still | |
16645 | laid out as per normal fortran. | |
7ca2d3a3 | 16646 | |
0963b4bd MS |
16647 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
16648 | version checking. */ | |
7ca2d3a3 | 16649 | |
905e0470 PM |
16650 | if (cu->language == language_fortran |
16651 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
16652 | { |
16653 | return DW_ORD_row_major; | |
16654 | } | |
16655 | ||
6e70227d | 16656 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
16657 | { |
16658 | case array_column_major: | |
16659 | return DW_ORD_col_major; | |
16660 | case array_row_major: | |
16661 | default: | |
16662 | return DW_ORD_row_major; | |
16663 | }; | |
16664 | } | |
16665 | ||
72019c9c | 16666 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 16667 | the DIE's type field. */ |
72019c9c | 16668 | |
f792889a | 16669 | static struct type * |
72019c9c GM |
16670 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
16671 | { | |
7e314c57 JK |
16672 | struct type *domain_type, *set_type; |
16673 | struct attribute *attr; | |
f792889a | 16674 | |
7e314c57 JK |
16675 | domain_type = die_type (die, cu); |
16676 | ||
16677 | /* The die_type call above may have already set the type for this DIE. */ | |
16678 | set_type = get_die_type (die, cu); | |
16679 | if (set_type) | |
16680 | return set_type; | |
16681 | ||
16682 | set_type = create_set_type (NULL, domain_type); | |
16683 | ||
16684 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
d09039dd PM |
16685 | if (attr) |
16686 | TYPE_LENGTH (set_type) = DW_UNSND (attr); | |
7e314c57 | 16687 | |
2b4424c3 TT |
16688 | maybe_set_alignment (cu, die, set_type); |
16689 | ||
f792889a | 16690 | return set_die_type (die, set_type, cu); |
72019c9c | 16691 | } |
7ca2d3a3 | 16692 | |
0971de02 TT |
16693 | /* A helper for read_common_block that creates a locexpr baton. |
16694 | SYM is the symbol which we are marking as computed. | |
16695 | COMMON_DIE is the DIE for the common block. | |
16696 | COMMON_LOC is the location expression attribute for the common | |
16697 | block itself. | |
16698 | MEMBER_LOC is the location expression attribute for the particular | |
16699 | member of the common block that we are processing. | |
16700 | CU is the CU from which the above come. */ | |
16701 | ||
16702 | static void | |
16703 | mark_common_block_symbol_computed (struct symbol *sym, | |
16704 | struct die_info *common_die, | |
16705 | struct attribute *common_loc, | |
16706 | struct attribute *member_loc, | |
16707 | struct dwarf2_cu *cu) | |
16708 | { | |
518817b3 SM |
16709 | struct dwarf2_per_objfile *dwarf2_per_objfile |
16710 | = cu->per_cu->dwarf2_per_objfile; | |
0971de02 TT |
16711 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
16712 | struct dwarf2_locexpr_baton *baton; | |
16713 | gdb_byte *ptr; | |
16714 | unsigned int cu_off; | |
16715 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
16716 | LONGEST offset = 0; | |
16717 | ||
16718 | gdb_assert (common_loc && member_loc); | |
16719 | gdb_assert (attr_form_is_block (common_loc)); | |
16720 | gdb_assert (attr_form_is_block (member_loc) | |
16721 | || attr_form_is_constant (member_loc)); | |
16722 | ||
8d749320 | 16723 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
0971de02 TT |
16724 | baton->per_cu = cu->per_cu; |
16725 | gdb_assert (baton->per_cu); | |
16726 | ||
16727 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
16728 | ||
16729 | if (attr_form_is_constant (member_loc)) | |
16730 | { | |
16731 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
16732 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
16733 | } | |
16734 | else | |
16735 | baton->size += DW_BLOCK (member_loc)->size; | |
16736 | ||
224c3ddb | 16737 | ptr = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, baton->size); |
0971de02 TT |
16738 | baton->data = ptr; |
16739 | ||
16740 | *ptr++ = DW_OP_call4; | |
9c541725 | 16741 | cu_off = common_die->sect_off - cu->per_cu->sect_off; |
0971de02 TT |
16742 | store_unsigned_integer (ptr, 4, byte_order, cu_off); |
16743 | ptr += 4; | |
16744 | ||
16745 | if (attr_form_is_constant (member_loc)) | |
16746 | { | |
16747 | *ptr++ = DW_OP_addr; | |
16748 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
16749 | ptr += cu->header.addr_size; | |
16750 | } | |
16751 | else | |
16752 | { | |
16753 | /* We have to copy the data here, because DW_OP_call4 will only | |
16754 | use a DW_AT_location attribute. */ | |
16755 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
16756 | ptr += DW_BLOCK (member_loc)->size; | |
16757 | } | |
16758 | ||
16759 | *ptr++ = DW_OP_plus; | |
16760 | gdb_assert (ptr - baton->data == baton->size); | |
16761 | ||
0971de02 | 16762 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 16763 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
16764 | } |
16765 | ||
4357ac6c TT |
16766 | /* Create appropriate locally-scoped variables for all the |
16767 | DW_TAG_common_block entries. Also create a struct common_block | |
16768 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
16769 | is used to sepate the common blocks name namespace from regular | |
16770 | variable names. */ | |
c906108c SS |
16771 | |
16772 | static void | |
e7c27a73 | 16773 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16774 | { |
0971de02 TT |
16775 | struct attribute *attr; |
16776 | ||
16777 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
16778 | if (attr) | |
16779 | { | |
16780 | /* Support the .debug_loc offsets. */ | |
16781 | if (attr_form_is_block (attr)) | |
16782 | { | |
16783 | /* Ok. */ | |
16784 | } | |
16785 | else if (attr_form_is_section_offset (attr)) | |
16786 | { | |
16787 | dwarf2_complex_location_expr_complaint (); | |
16788 | attr = NULL; | |
16789 | } | |
16790 | else | |
16791 | { | |
16792 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
16793 | "common block member"); | |
16794 | attr = NULL; | |
16795 | } | |
16796 | } | |
16797 | ||
639d11d3 | 16798 | if (die->child != NULL) |
c906108c | 16799 | { |
518817b3 | 16800 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
4357ac6c TT |
16801 | struct die_info *child_die; |
16802 | size_t n_entries = 0, size; | |
16803 | struct common_block *common_block; | |
16804 | struct symbol *sym; | |
74ac6d43 | 16805 | |
4357ac6c TT |
16806 | for (child_die = die->child; |
16807 | child_die && child_die->tag; | |
16808 | child_die = sibling_die (child_die)) | |
16809 | ++n_entries; | |
16810 | ||
16811 | size = (sizeof (struct common_block) | |
16812 | + (n_entries - 1) * sizeof (struct symbol *)); | |
224c3ddb SM |
16813 | common_block |
16814 | = (struct common_block *) obstack_alloc (&objfile->objfile_obstack, | |
16815 | size); | |
4357ac6c TT |
16816 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); |
16817 | common_block->n_entries = 0; | |
16818 | ||
16819 | for (child_die = die->child; | |
16820 | child_die && child_die->tag; | |
16821 | child_die = sibling_die (child_die)) | |
16822 | { | |
16823 | /* Create the symbol in the DW_TAG_common_block block in the current | |
16824 | symbol scope. */ | |
e7c27a73 | 16825 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
16826 | if (sym != NULL) |
16827 | { | |
16828 | struct attribute *member_loc; | |
16829 | ||
16830 | common_block->contents[common_block->n_entries++] = sym; | |
16831 | ||
16832 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
16833 | cu); | |
16834 | if (member_loc) | |
16835 | { | |
16836 | /* GDB has handled this for a long time, but it is | |
16837 | not specified by DWARF. It seems to have been | |
16838 | emitted by gfortran at least as recently as: | |
16839 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
b98664d3 | 16840 | complaint (_("Variable in common block has " |
0971de02 | 16841 | "DW_AT_data_member_location " |
9d8780f0 SM |
16842 | "- DIE at %s [in module %s]"), |
16843 | sect_offset_str (child_die->sect_off), | |
518817b3 | 16844 | objfile_name (objfile)); |
0971de02 TT |
16845 | |
16846 | if (attr_form_is_section_offset (member_loc)) | |
16847 | dwarf2_complex_location_expr_complaint (); | |
16848 | else if (attr_form_is_constant (member_loc) | |
16849 | || attr_form_is_block (member_loc)) | |
16850 | { | |
16851 | if (attr) | |
16852 | mark_common_block_symbol_computed (sym, die, attr, | |
16853 | member_loc, cu); | |
16854 | } | |
16855 | else | |
16856 | dwarf2_complex_location_expr_complaint (); | |
16857 | } | |
16858 | } | |
c906108c | 16859 | } |
4357ac6c TT |
16860 | |
16861 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
16862 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
16863 | } |
16864 | } | |
16865 | ||
0114d602 | 16866 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 16867 | |
0114d602 DJ |
16868 | static struct type * |
16869 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 16870 | { |
518817b3 | 16871 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 16872 | const char *previous_prefix, *name; |
9219021c | 16873 | int is_anonymous; |
0114d602 DJ |
16874 | struct type *type; |
16875 | ||
16876 | /* For extensions, reuse the type of the original namespace. */ | |
16877 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
16878 | { | |
16879 | struct die_info *ext_die; | |
16880 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 16881 | |
0114d602 DJ |
16882 | ext_die = dwarf2_extension (die, &ext_cu); |
16883 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
16884 | |
16885 | /* EXT_CU may not be the same as CU. | |
02142a6c | 16886 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
16887 | return set_die_type (die, type, cu); |
16888 | } | |
9219021c | 16889 | |
e142c38c | 16890 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
16891 | |
16892 | /* Now build the name of the current namespace. */ | |
16893 | ||
0114d602 DJ |
16894 | previous_prefix = determine_prefix (die, cu); |
16895 | if (previous_prefix[0] != '\0') | |
16896 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 16897 | previous_prefix, name, 0, cu); |
0114d602 DJ |
16898 | |
16899 | /* Create the type. */ | |
19f392bc | 16900 | type = init_type (objfile, TYPE_CODE_NAMESPACE, 0, name); |
0114d602 | 16901 | |
60531b24 | 16902 | return set_die_type (die, type, cu); |
0114d602 DJ |
16903 | } |
16904 | ||
22cee43f | 16905 | /* Read a namespace scope. */ |
0114d602 DJ |
16906 | |
16907 | static void | |
16908 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
16909 | { | |
518817b3 | 16910 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 16911 | int is_anonymous; |
9219021c | 16912 | |
5c4e30ca DC |
16913 | /* Add a symbol associated to this if we haven't seen the namespace |
16914 | before. Also, add a using directive if it's an anonymous | |
16915 | namespace. */ | |
9219021c | 16916 | |
f2f0e013 | 16917 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
16918 | { |
16919 | struct type *type; | |
16920 | ||
0114d602 | 16921 | type = read_type_die (die, cu); |
e7c27a73 | 16922 | new_symbol (die, type, cu); |
5c4e30ca | 16923 | |
e8e80198 | 16924 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 16925 | if (is_anonymous) |
0114d602 DJ |
16926 | { |
16927 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 16928 | |
eb1e02fd | 16929 | std::vector<const char *> excludes; |
804d2729 | 16930 | add_using_directive (using_directives (cu), |
22cee43f | 16931 | previous_prefix, TYPE_NAME (type), NULL, |
eb1e02fd | 16932 | NULL, excludes, 0, &objfile->objfile_obstack); |
0114d602 | 16933 | } |
5c4e30ca | 16934 | } |
9219021c | 16935 | |
639d11d3 | 16936 | if (die->child != NULL) |
d9fa45fe | 16937 | { |
639d11d3 | 16938 | struct die_info *child_die = die->child; |
6e70227d | 16939 | |
d9fa45fe DC |
16940 | while (child_die && child_die->tag) |
16941 | { | |
e7c27a73 | 16942 | process_die (child_die, cu); |
d9fa45fe DC |
16943 | child_die = sibling_die (child_die); |
16944 | } | |
16945 | } | |
38d518c9 EZ |
16946 | } |
16947 | ||
f55ee35c JK |
16948 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
16949 | imported module. Still we need that type as local Fortran "use ... only" | |
16950 | declaration imports depend on the created type in determine_prefix. */ | |
16951 | ||
16952 | static struct type * | |
16953 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
16954 | { | |
518817b3 | 16955 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
15d034d0 | 16956 | const char *module_name; |
f55ee35c JK |
16957 | struct type *type; |
16958 | ||
16959 | module_name = dwarf2_name (die, cu); | |
19f392bc | 16960 | type = init_type (objfile, TYPE_CODE_MODULE, 0, module_name); |
f55ee35c | 16961 | |
f55ee35c JK |
16962 | return set_die_type (die, type, cu); |
16963 | } | |
16964 | ||
5d7cb8df JK |
16965 | /* Read a Fortran module. */ |
16966 | ||
16967 | static void | |
16968 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
16969 | { | |
16970 | struct die_info *child_die = die->child; | |
530e8392 KB |
16971 | struct type *type; |
16972 | ||
16973 | type = read_type_die (die, cu); | |
16974 | new_symbol (die, type, cu); | |
5d7cb8df | 16975 | |
5d7cb8df JK |
16976 | while (child_die && child_die->tag) |
16977 | { | |
16978 | process_die (child_die, cu); | |
16979 | child_die = sibling_die (child_die); | |
16980 | } | |
16981 | } | |
16982 | ||
38d518c9 EZ |
16983 | /* Return the name of the namespace represented by DIE. Set |
16984 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
16985 | namespace. */ | |
16986 | ||
16987 | static const char * | |
e142c38c | 16988 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
16989 | { |
16990 | struct die_info *current_die; | |
16991 | const char *name = NULL; | |
16992 | ||
16993 | /* Loop through the extensions until we find a name. */ | |
16994 | ||
16995 | for (current_die = die; | |
16996 | current_die != NULL; | |
f2f0e013 | 16997 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 16998 | { |
96553a0c DE |
16999 | /* We don't use dwarf2_name here so that we can detect the absence |
17000 | of a name -> anonymous namespace. */ | |
7d45c7c3 | 17001 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
96553a0c | 17002 | |
38d518c9 EZ |
17003 | if (name != NULL) |
17004 | break; | |
17005 | } | |
17006 | ||
17007 | /* Is it an anonymous namespace? */ | |
17008 | ||
17009 | *is_anonymous = (name == NULL); | |
17010 | if (*is_anonymous) | |
2b1dbab0 | 17011 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
17012 | |
17013 | return name; | |
d9fa45fe DC |
17014 | } |
17015 | ||
c906108c SS |
17016 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
17017 | the user defined type vector. */ | |
17018 | ||
f792889a | 17019 | static struct type * |
e7c27a73 | 17020 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17021 | { |
518817b3 SM |
17022 | struct gdbarch *gdbarch |
17023 | = get_objfile_arch (cu->per_cu->dwarf2_per_objfile->objfile); | |
e7c27a73 | 17024 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 17025 | struct type *type; |
8b2dbe47 KB |
17026 | struct attribute *attr_byte_size; |
17027 | struct attribute *attr_address_class; | |
17028 | int byte_size, addr_class; | |
7e314c57 JK |
17029 | struct type *target_type; |
17030 | ||
17031 | target_type = die_type (die, cu); | |
c906108c | 17032 | |
7e314c57 JK |
17033 | /* The die_type call above may have already set the type for this DIE. */ |
17034 | type = get_die_type (die, cu); | |
17035 | if (type) | |
17036 | return type; | |
17037 | ||
17038 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 17039 | |
e142c38c | 17040 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
17041 | if (attr_byte_size) |
17042 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 17043 | else |
8b2dbe47 KB |
17044 | byte_size = cu_header->addr_size; |
17045 | ||
e142c38c | 17046 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
17047 | if (attr_address_class) |
17048 | addr_class = DW_UNSND (attr_address_class); | |
17049 | else | |
17050 | addr_class = DW_ADDR_none; | |
17051 | ||
2b4424c3 TT |
17052 | ULONGEST alignment = get_alignment (cu, die); |
17053 | ||
17054 | /* If the pointer size, alignment, or address class is different | |
17055 | than the default, create a type variant marked as such and set | |
17056 | the length accordingly. */ | |
17057 | if (TYPE_LENGTH (type) != byte_size | |
17058 | || (alignment != 0 && TYPE_RAW_ALIGN (type) != 0 | |
17059 | && alignment != TYPE_RAW_ALIGN (type)) | |
17060 | || addr_class != DW_ADDR_none) | |
c906108c | 17061 | { |
5e2b427d | 17062 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
17063 | { |
17064 | int type_flags; | |
17065 | ||
849957d9 | 17066 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 17067 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
17068 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
17069 | == 0); | |
8b2dbe47 KB |
17070 | type = make_type_with_address_space (type, type_flags); |
17071 | } | |
17072 | else if (TYPE_LENGTH (type) != byte_size) | |
17073 | { | |
b98664d3 | 17074 | complaint (_("invalid pointer size %d"), byte_size); |
8b2dbe47 | 17075 | } |
2b4424c3 TT |
17076 | else if (TYPE_RAW_ALIGN (type) != alignment) |
17077 | { | |
b98664d3 | 17078 | complaint (_("Invalid DW_AT_alignment" |
2b4424c3 TT |
17079 | " - DIE at %s [in module %s]"), |
17080 | sect_offset_str (die->sect_off), | |
17081 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
17082 | } | |
6e70227d | 17083 | else |
9a619af0 MS |
17084 | { |
17085 | /* Should we also complain about unhandled address classes? */ | |
17086 | } | |
c906108c | 17087 | } |
8b2dbe47 KB |
17088 | |
17089 | TYPE_LENGTH (type) = byte_size; | |
2b4424c3 | 17090 | set_type_align (type, alignment); |
f792889a | 17091 | return set_die_type (die, type, cu); |
c906108c SS |
17092 | } |
17093 | ||
17094 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
17095 | the user defined type vector. */ | |
17096 | ||
f792889a | 17097 | static struct type * |
e7c27a73 | 17098 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
17099 | { |
17100 | struct type *type; | |
17101 | struct type *to_type; | |
17102 | struct type *domain; | |
17103 | ||
e7c27a73 DJ |
17104 | to_type = die_type (die, cu); |
17105 | domain = die_containing_type (die, cu); | |
0d5de010 | 17106 | |
7e314c57 JK |
17107 | /* The calls above may have already set the type for this DIE. */ |
17108 | type = get_die_type (die, cu); | |
17109 | if (type) | |
17110 | return type; | |
17111 | ||
0d5de010 DJ |
17112 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
17113 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
17114 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
17115 | { | |
518817b3 SM |
17116 | struct type *new_type |
17117 | = alloc_type (cu->per_cu->dwarf2_per_objfile->objfile); | |
7078baeb TT |
17118 | |
17119 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
17120 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
17121 | TYPE_VARARGS (to_type)); | |
17122 | type = lookup_methodptr_type (new_type); | |
17123 | } | |
0d5de010 DJ |
17124 | else |
17125 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 17126 | |
f792889a | 17127 | return set_die_type (die, type, cu); |
c906108c SS |
17128 | } |
17129 | ||
4297a3f0 | 17130 | /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to |
c906108c SS |
17131 | the user defined type vector. */ |
17132 | ||
f792889a | 17133 | static struct type * |
4297a3f0 AV |
17134 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu, |
17135 | enum type_code refcode) | |
c906108c | 17136 | { |
e7c27a73 | 17137 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 17138 | struct type *type, *target_type; |
c906108c SS |
17139 | struct attribute *attr; |
17140 | ||
4297a3f0 AV |
17141 | gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF); |
17142 | ||
7e314c57 JK |
17143 | target_type = die_type (die, cu); |
17144 | ||
17145 | /* The die_type call above may have already set the type for this DIE. */ | |
17146 | type = get_die_type (die, cu); | |
17147 | if (type) | |
17148 | return type; | |
17149 | ||
4297a3f0 | 17150 | type = lookup_reference_type (target_type, refcode); |
e142c38c | 17151 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
17152 | if (attr) |
17153 | { | |
17154 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
17155 | } | |
17156 | else | |
17157 | { | |
107d2387 | 17158 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 17159 | } |
2b4424c3 | 17160 | maybe_set_alignment (cu, die, type); |
f792889a | 17161 | return set_die_type (die, type, cu); |
c906108c SS |
17162 | } |
17163 | ||
cf363f18 MW |
17164 | /* Add the given cv-qualifiers to the element type of the array. GCC |
17165 | outputs DWARF type qualifiers that apply to an array, not the | |
17166 | element type. But GDB relies on the array element type to carry | |
17167 | the cv-qualifiers. This mimics section 6.7.3 of the C99 | |
17168 | specification. */ | |
17169 | ||
17170 | static struct type * | |
17171 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, | |
17172 | struct type *base_type, int cnst, int voltl) | |
17173 | { | |
17174 | struct type *el_type, *inner_array; | |
17175 | ||
17176 | base_type = copy_type (base_type); | |
17177 | inner_array = base_type; | |
17178 | ||
17179 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
17180 | { | |
17181 | TYPE_TARGET_TYPE (inner_array) = | |
17182 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
17183 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
17184 | } | |
17185 | ||
17186 | el_type = TYPE_TARGET_TYPE (inner_array); | |
17187 | cnst |= TYPE_CONST (el_type); | |
17188 | voltl |= TYPE_VOLATILE (el_type); | |
17189 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); | |
17190 | ||
17191 | return set_die_type (die, base_type, cu); | |
17192 | } | |
17193 | ||
f792889a | 17194 | static struct type * |
e7c27a73 | 17195 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17196 | { |
f792889a | 17197 | struct type *base_type, *cv_type; |
c906108c | 17198 | |
e7c27a73 | 17199 | base_type = die_type (die, cu); |
7e314c57 JK |
17200 | |
17201 | /* The die_type call above may have already set the type for this DIE. */ | |
17202 | cv_type = get_die_type (die, cu); | |
17203 | if (cv_type) | |
17204 | return cv_type; | |
17205 | ||
2f608a3a KW |
17206 | /* In case the const qualifier is applied to an array type, the element type |
17207 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
17208 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
cf363f18 | 17209 | return add_array_cv_type (die, cu, base_type, 1, 0); |
2f608a3a | 17210 | |
f792889a DJ |
17211 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
17212 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
17213 | } |
17214 | ||
f792889a | 17215 | static struct type * |
e7c27a73 | 17216 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17217 | { |
f792889a | 17218 | struct type *base_type, *cv_type; |
c906108c | 17219 | |
e7c27a73 | 17220 | base_type = die_type (die, cu); |
7e314c57 JK |
17221 | |
17222 | /* The die_type call above may have already set the type for this DIE. */ | |
17223 | cv_type = get_die_type (die, cu); | |
17224 | if (cv_type) | |
17225 | return cv_type; | |
17226 | ||
cf363f18 MW |
17227 | /* In case the volatile qualifier is applied to an array type, the |
17228 | element type is so qualified, not the array type (section 6.7.3 | |
17229 | of C99). */ | |
17230 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
17231 | return add_array_cv_type (die, cu, base_type, 0, 1); | |
17232 | ||
f792889a DJ |
17233 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
17234 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
17235 | } |
17236 | ||
06d66ee9 TT |
17237 | /* Handle DW_TAG_restrict_type. */ |
17238 | ||
17239 | static struct type * | |
17240 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
17241 | { | |
17242 | struct type *base_type, *cv_type; | |
17243 | ||
17244 | base_type = die_type (die, cu); | |
17245 | ||
17246 | /* The die_type call above may have already set the type for this DIE. */ | |
17247 | cv_type = get_die_type (die, cu); | |
17248 | if (cv_type) | |
17249 | return cv_type; | |
17250 | ||
17251 | cv_type = make_restrict_type (base_type); | |
17252 | return set_die_type (die, cv_type, cu); | |
17253 | } | |
17254 | ||
a2c2acaf MW |
17255 | /* Handle DW_TAG_atomic_type. */ |
17256 | ||
17257 | static struct type * | |
17258 | read_tag_atomic_type (struct die_info *die, struct dwarf2_cu *cu) | |
17259 | { | |
17260 | struct type *base_type, *cv_type; | |
17261 | ||
17262 | base_type = die_type (die, cu); | |
17263 | ||
17264 | /* The die_type call above may have already set the type for this DIE. */ | |
17265 | cv_type = get_die_type (die, cu); | |
17266 | if (cv_type) | |
17267 | return cv_type; | |
17268 | ||
17269 | cv_type = make_atomic_type (base_type); | |
17270 | return set_die_type (die, cv_type, cu); | |
17271 | } | |
17272 | ||
c906108c SS |
17273 | /* Extract all information from a DW_TAG_string_type DIE and add to |
17274 | the user defined type vector. It isn't really a user defined type, | |
17275 | but it behaves like one, with other DIE's using an AT_user_def_type | |
17276 | attribute to reference it. */ | |
17277 | ||
f792889a | 17278 | static struct type * |
e7c27a73 | 17279 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17280 | { |
518817b3 | 17281 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3b7538c0 | 17282 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
17283 | struct type *type, *range_type, *index_type, *char_type; |
17284 | struct attribute *attr; | |
17285 | unsigned int length; | |
17286 | ||
e142c38c | 17287 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
17288 | if (attr) |
17289 | { | |
17290 | length = DW_UNSND (attr); | |
17291 | } | |
17292 | else | |
17293 | { | |
0963b4bd | 17294 | /* Check for the DW_AT_byte_size attribute. */ |
e142c38c | 17295 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
17296 | if (attr) |
17297 | { | |
17298 | length = DW_UNSND (attr); | |
17299 | } | |
17300 | else | |
17301 | { | |
17302 | length = 1; | |
17303 | } | |
c906108c | 17304 | } |
6ccb9162 | 17305 | |
46bf5051 | 17306 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 17307 | range_type = create_static_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
17308 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
17309 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 17310 | |
f792889a | 17311 | return set_die_type (die, type, cu); |
c906108c SS |
17312 | } |
17313 | ||
4d804846 JB |
17314 | /* Assuming that DIE corresponds to a function, returns nonzero |
17315 | if the function is prototyped. */ | |
17316 | ||
17317 | static int | |
17318 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
17319 | { | |
17320 | struct attribute *attr; | |
17321 | ||
17322 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
17323 | if (attr && (DW_UNSND (attr) != 0)) | |
17324 | return 1; | |
17325 | ||
17326 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
17327 | is only meaninful for C, but the concept also extends to other | |
17328 | languages that allow unprototyped functions (Eg: Objective C). | |
17329 | For all other languages, assume that functions are always | |
17330 | prototyped. */ | |
17331 | if (cu->language != language_c | |
17332 | && cu->language != language_objc | |
17333 | && cu->language != language_opencl) | |
17334 | return 1; | |
17335 | ||
17336 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
17337 | prototyped and unprototyped functions; default to prototyped, | |
17338 | since that is more common in modern code (and RealView warns | |
17339 | about unprototyped functions). */ | |
17340 | if (producer_is_realview (cu->producer)) | |
17341 | return 1; | |
17342 | ||
17343 | return 0; | |
17344 | } | |
17345 | ||
c906108c SS |
17346 | /* Handle DIES due to C code like: |
17347 | ||
17348 | struct foo | |
c5aa993b JM |
17349 | { |
17350 | int (*funcp)(int a, long l); | |
17351 | int b; | |
17352 | }; | |
c906108c | 17353 | |
0963b4bd | 17354 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 17355 | |
f792889a | 17356 | static struct type * |
e7c27a73 | 17357 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17358 | { |
518817b3 | 17359 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0963b4bd MS |
17360 | struct type *type; /* Type that this function returns. */ |
17361 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
17362 | struct attribute *attr; |
17363 | ||
e7c27a73 | 17364 | type = die_type (die, cu); |
7e314c57 JK |
17365 | |
17366 | /* The die_type call above may have already set the type for this DIE. */ | |
17367 | ftype = get_die_type (die, cu); | |
17368 | if (ftype) | |
17369 | return ftype; | |
17370 | ||
0c8b41f1 | 17371 | ftype = lookup_function_type (type); |
c906108c | 17372 | |
4d804846 | 17373 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 17374 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 17375 | |
c055b101 CV |
17376 | /* Store the calling convention in the type if it's available in |
17377 | the subroutine die. Otherwise set the calling convention to | |
17378 | the default value DW_CC_normal. */ | |
17379 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
54fcddd0 UW |
17380 | if (attr) |
17381 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); | |
17382 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) | |
17383 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
17384 | else | |
17385 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 | 17386 | |
743649fd MW |
17387 | /* Record whether the function returns normally to its caller or not |
17388 | if the DWARF producer set that information. */ | |
17389 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); | |
17390 | if (attr && (DW_UNSND (attr) != 0)) | |
17391 | TYPE_NO_RETURN (ftype) = 1; | |
17392 | ||
76c10ea2 GM |
17393 | /* We need to add the subroutine type to the die immediately so |
17394 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 17395 | declared as the same subroutine type. */ |
76c10ea2 | 17396 | set_die_type (die, ftype, cu); |
6e70227d | 17397 | |
639d11d3 | 17398 | if (die->child != NULL) |
c906108c | 17399 | { |
bb5ed363 | 17400 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 17401 | struct die_info *child_die; |
8072405b | 17402 | int nparams, iparams; |
c906108c SS |
17403 | |
17404 | /* Count the number of parameters. | |
17405 | FIXME: GDB currently ignores vararg functions, but knows about | |
17406 | vararg member functions. */ | |
8072405b | 17407 | nparams = 0; |
639d11d3 | 17408 | child_die = die->child; |
c906108c SS |
17409 | while (child_die && child_die->tag) |
17410 | { | |
17411 | if (child_die->tag == DW_TAG_formal_parameter) | |
17412 | nparams++; | |
17413 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 17414 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
17415 | child_die = sibling_die (child_die); |
17416 | } | |
17417 | ||
17418 | /* Allocate storage for parameters and fill them in. */ | |
17419 | TYPE_NFIELDS (ftype) = nparams; | |
17420 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 17421 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 17422 | |
8072405b JK |
17423 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
17424 | even if we error out during the parameters reading below. */ | |
17425 | for (iparams = 0; iparams < nparams; iparams++) | |
17426 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
17427 | ||
17428 | iparams = 0; | |
639d11d3 | 17429 | child_die = die->child; |
c906108c SS |
17430 | while (child_die && child_die->tag) |
17431 | { | |
17432 | if (child_die->tag == DW_TAG_formal_parameter) | |
17433 | { | |
3ce3b1ba PA |
17434 | struct type *arg_type; |
17435 | ||
17436 | /* DWARF version 2 has no clean way to discern C++ | |
17437 | static and non-static member functions. G++ helps | |
17438 | GDB by marking the first parameter for non-static | |
17439 | member functions (which is the this pointer) as | |
17440 | artificial. We pass this information to | |
17441 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
17442 | ||
17443 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
17444 | 4.5 does not yet generate. */ | |
e142c38c | 17445 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
17446 | if (attr) |
17447 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
17448 | else | |
9c37b5ae | 17449 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
3ce3b1ba PA |
17450 | arg_type = die_type (child_die, cu); |
17451 | ||
17452 | /* RealView does not mark THIS as const, which the testsuite | |
17453 | expects. GCC marks THIS as const in method definitions, | |
17454 | but not in the class specifications (GCC PR 43053). */ | |
17455 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
17456 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
17457 | { | |
17458 | int is_this = 0; | |
17459 | struct dwarf2_cu *arg_cu = cu; | |
17460 | const char *name = dwarf2_name (child_die, cu); | |
17461 | ||
17462 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
17463 | if (attr) | |
17464 | { | |
17465 | /* If the compiler emits this, use it. */ | |
17466 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
17467 | is_this = 1; | |
17468 | } | |
17469 | else if (name && strcmp (name, "this") == 0) | |
17470 | /* Function definitions will have the argument names. */ | |
17471 | is_this = 1; | |
17472 | else if (name == NULL && iparams == 0) | |
17473 | /* Declarations may not have the names, so like | |
17474 | elsewhere in GDB, assume an artificial first | |
17475 | argument is "this". */ | |
17476 | is_this = 1; | |
17477 | ||
17478 | if (is_this) | |
17479 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
17480 | arg_type, 0); | |
17481 | } | |
17482 | ||
17483 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
17484 | iparams++; |
17485 | } | |
17486 | child_die = sibling_die (child_die); | |
17487 | } | |
17488 | } | |
17489 | ||
76c10ea2 | 17490 | return ftype; |
c906108c SS |
17491 | } |
17492 | ||
f792889a | 17493 | static struct type * |
e7c27a73 | 17494 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17495 | { |
518817b3 | 17496 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 17497 | const char *name = NULL; |
3c8e0968 | 17498 | struct type *this_type, *target_type; |
c906108c | 17499 | |
94af9270 | 17500 | name = dwarf2_full_name (NULL, die, cu); |
19f392bc UW |
17501 | this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, name); |
17502 | TYPE_TARGET_STUB (this_type) = 1; | |
f792889a | 17503 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
17504 | target_type = die_type (die, cu); |
17505 | if (target_type != this_type) | |
17506 | TYPE_TARGET_TYPE (this_type) = target_type; | |
17507 | else | |
17508 | { | |
17509 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
17510 | spec and cause infinite loops in GDB. */ | |
b98664d3 | 17511 | complaint (_("Self-referential DW_TAG_typedef " |
9d8780f0 SM |
17512 | "- DIE at %s [in module %s]"), |
17513 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
3c8e0968 DE |
17514 | TYPE_TARGET_TYPE (this_type) = NULL; |
17515 | } | |
f792889a | 17516 | return this_type; |
c906108c SS |
17517 | } |
17518 | ||
9b790ce7 UW |
17519 | /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT |
17520 | (which may be different from NAME) to the architecture back-end to allow | |
17521 | it to guess the correct format if necessary. */ | |
17522 | ||
17523 | static struct type * | |
17524 | dwarf2_init_float_type (struct objfile *objfile, int bits, const char *name, | |
17525 | const char *name_hint) | |
17526 | { | |
17527 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
17528 | const struct floatformat **format; | |
17529 | struct type *type; | |
17530 | ||
17531 | format = gdbarch_floatformat_for_type (gdbarch, name_hint, bits); | |
17532 | if (format) | |
17533 | type = init_float_type (objfile, bits, name, format); | |
17534 | else | |
77b7c781 | 17535 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
9b790ce7 UW |
17536 | |
17537 | return type; | |
17538 | } | |
17539 | ||
eb77c9df AB |
17540 | /* Allocate an integer type of size BITS and name NAME. */ |
17541 | ||
17542 | static struct type * | |
17543 | dwarf2_init_integer_type (struct dwarf2_cu *cu, struct objfile *objfile, | |
17544 | int bits, int unsigned_p, const char *name) | |
17545 | { | |
17546 | struct type *type; | |
17547 | ||
17548 | /* Versions of Intel's C Compiler generate an integer type called "void" | |
17549 | instead of using DW_TAG_unspecified_type. This has been seen on | |
17550 | at least versions 14, 17, and 18. */ | |
35ee2dc2 AB |
17551 | if (bits == 0 && producer_is_icc (cu) && name != nullptr |
17552 | && strcmp (name, "void") == 0) | |
eb77c9df AB |
17553 | type = objfile_type (objfile)->builtin_void; |
17554 | else | |
17555 | type = init_integer_type (objfile, bits, unsigned_p, name); | |
17556 | ||
17557 | return type; | |
17558 | } | |
17559 | ||
8bdc1658 AB |
17560 | /* Initialise and return a floating point type of size BITS suitable for |
17561 | use as a component of a complex number. The NAME_HINT is passed through | |
17562 | when initialising the floating point type and is the name of the complex | |
17563 | type. | |
17564 | ||
17565 | As DWARF doesn't currently provide an explicit name for the components | |
17566 | of a complex number, but it can be helpful to have these components | |
17567 | named, we try to select a suitable name based on the size of the | |
17568 | component. */ | |
17569 | static struct type * | |
17570 | dwarf2_init_complex_target_type (struct dwarf2_cu *cu, | |
17571 | struct objfile *objfile, | |
17572 | int bits, const char *name_hint) | |
17573 | { | |
17574 | gdbarch *gdbarch = get_objfile_arch (objfile); | |
17575 | struct type *tt = nullptr; | |
17576 | ||
35add35e AB |
17577 | /* Try to find a suitable floating point builtin type of size BITS. |
17578 | We're going to use the name of this type as the name for the complex | |
17579 | target type that we are about to create. */ | |
1db455a7 | 17580 | switch (cu->language) |
8bdc1658 | 17581 | { |
1db455a7 AB |
17582 | case language_fortran: |
17583 | switch (bits) | |
17584 | { | |
17585 | case 32: | |
17586 | tt = builtin_f_type (gdbarch)->builtin_real; | |
17587 | break; | |
17588 | case 64: | |
17589 | tt = builtin_f_type (gdbarch)->builtin_real_s8; | |
17590 | break; | |
17591 | case 96: /* The x86-32 ABI specifies 96-bit long double. */ | |
17592 | case 128: | |
17593 | tt = builtin_f_type (gdbarch)->builtin_real_s16; | |
17594 | break; | |
17595 | } | |
8bdc1658 | 17596 | break; |
1db455a7 AB |
17597 | default: |
17598 | switch (bits) | |
17599 | { | |
17600 | case 32: | |
17601 | tt = builtin_type (gdbarch)->builtin_float; | |
17602 | break; | |
17603 | case 64: | |
17604 | tt = builtin_type (gdbarch)->builtin_double; | |
17605 | break; | |
17606 | case 96: /* The x86-32 ABI specifies 96-bit long double. */ | |
17607 | case 128: | |
17608 | tt = builtin_type (gdbarch)->builtin_long_double; | |
17609 | break; | |
17610 | } | |
8bdc1658 AB |
17611 | break; |
17612 | } | |
17613 | ||
35add35e AB |
17614 | /* If the type we found doesn't match the size we were looking for, then |
17615 | pretend we didn't find a type at all, the complex target type we | |
17616 | create will then be nameless. */ | |
a12e5744 | 17617 | if (tt != nullptr && TYPE_LENGTH (tt) * TARGET_CHAR_BIT != bits) |
35add35e AB |
17618 | tt = nullptr; |
17619 | ||
8bdc1658 AB |
17620 | const char *name = (tt == nullptr) ? nullptr : TYPE_NAME (tt); |
17621 | return dwarf2_init_float_type (objfile, bits, name, name_hint); | |
17622 | } | |
17623 | ||
c906108c SS |
17624 | /* Find a representation of a given base type and install |
17625 | it in the TYPE field of the die. */ | |
17626 | ||
f792889a | 17627 | static struct type * |
e7c27a73 | 17628 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17629 | { |
518817b3 | 17630 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c SS |
17631 | struct type *type; |
17632 | struct attribute *attr; | |
19f392bc | 17633 | int encoding = 0, bits = 0; |
15d034d0 | 17634 | const char *name; |
c906108c | 17635 | |
e142c38c | 17636 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
17637 | if (attr) |
17638 | { | |
17639 | encoding = DW_UNSND (attr); | |
17640 | } | |
e142c38c | 17641 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
17642 | if (attr) |
17643 | { | |
19f392bc | 17644 | bits = DW_UNSND (attr) * TARGET_CHAR_BIT; |
c906108c | 17645 | } |
39cbfefa | 17646 | name = dwarf2_name (die, cu); |
6ccb9162 | 17647 | if (!name) |
c906108c | 17648 | { |
b98664d3 | 17649 | complaint (_("DW_AT_name missing from DW_TAG_base_type")); |
c906108c | 17650 | } |
6ccb9162 UW |
17651 | |
17652 | switch (encoding) | |
c906108c | 17653 | { |
6ccb9162 UW |
17654 | case DW_ATE_address: |
17655 | /* Turn DW_ATE_address into a void * pointer. */ | |
77b7c781 | 17656 | type = init_type (objfile, TYPE_CODE_VOID, TARGET_CHAR_BIT, NULL); |
19f392bc | 17657 | type = init_pointer_type (objfile, bits, name, type); |
6ccb9162 UW |
17658 | break; |
17659 | case DW_ATE_boolean: | |
19f392bc | 17660 | type = init_boolean_type (objfile, bits, 1, name); |
6ccb9162 UW |
17661 | break; |
17662 | case DW_ATE_complex_float: | |
8bdc1658 | 17663 | type = dwarf2_init_complex_target_type (cu, objfile, bits / 2, name); |
19f392bc | 17664 | type = init_complex_type (objfile, name, type); |
6ccb9162 UW |
17665 | break; |
17666 | case DW_ATE_decimal_float: | |
19f392bc | 17667 | type = init_decfloat_type (objfile, bits, name); |
6ccb9162 UW |
17668 | break; |
17669 | case DW_ATE_float: | |
9b790ce7 | 17670 | type = dwarf2_init_float_type (objfile, bits, name, name); |
6ccb9162 UW |
17671 | break; |
17672 | case DW_ATE_signed: | |
eb77c9df | 17673 | type = dwarf2_init_integer_type (cu, objfile, bits, 0, name); |
6ccb9162 UW |
17674 | break; |
17675 | case DW_ATE_unsigned: | |
3b2b8fea TT |
17676 | if (cu->language == language_fortran |
17677 | && name | |
61012eef | 17678 | && startswith (name, "character(")) |
19f392bc UW |
17679 | type = init_character_type (objfile, bits, 1, name); |
17680 | else | |
eb77c9df | 17681 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
6ccb9162 UW |
17682 | break; |
17683 | case DW_ATE_signed_char: | |
6e70227d | 17684 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
17685 | || cu->language == language_pascal |
17686 | || cu->language == language_fortran) | |
19f392bc UW |
17687 | type = init_character_type (objfile, bits, 0, name); |
17688 | else | |
eb77c9df | 17689 | type = dwarf2_init_integer_type (cu, objfile, bits, 0, name); |
6ccb9162 UW |
17690 | break; |
17691 | case DW_ATE_unsigned_char: | |
868a0084 | 17692 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea | 17693 | || cu->language == language_pascal |
c44af4eb TT |
17694 | || cu->language == language_fortran |
17695 | || cu->language == language_rust) | |
19f392bc UW |
17696 | type = init_character_type (objfile, bits, 1, name); |
17697 | else | |
eb77c9df | 17698 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
6ccb9162 | 17699 | break; |
75079b2b | 17700 | case DW_ATE_UTF: |
53e710ac PA |
17701 | { |
17702 | gdbarch *arch = get_objfile_arch (objfile); | |
17703 | ||
17704 | if (bits == 16) | |
17705 | type = builtin_type (arch)->builtin_char16; | |
17706 | else if (bits == 32) | |
17707 | type = builtin_type (arch)->builtin_char32; | |
17708 | else | |
17709 | { | |
b98664d3 | 17710 | complaint (_("unsupported DW_ATE_UTF bit size: '%d'"), |
53e710ac | 17711 | bits); |
eb77c9df | 17712 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
53e710ac PA |
17713 | } |
17714 | return set_die_type (die, type, cu); | |
17715 | } | |
75079b2b TT |
17716 | break; |
17717 | ||
6ccb9162 | 17718 | default: |
b98664d3 | 17719 | complaint (_("unsupported DW_AT_encoding: '%s'"), |
6ccb9162 | 17720 | dwarf_type_encoding_name (encoding)); |
77b7c781 | 17721 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
6ccb9162 | 17722 | break; |
c906108c | 17723 | } |
6ccb9162 | 17724 | |
0114d602 | 17725 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 17726 | TYPE_NOSIGN (type) = 1; |
0114d602 | 17727 | |
2b4424c3 TT |
17728 | maybe_set_alignment (cu, die, type); |
17729 | ||
f792889a | 17730 | return set_die_type (die, type, cu); |
c906108c SS |
17731 | } |
17732 | ||
80180f79 SA |
17733 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
17734 | resulting value of the attribute into struct bound_prop. | |
17735 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
17736 | ||
17737 | static int | |
17738 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
9a49df9d AB |
17739 | struct dwarf2_cu *cu, struct dynamic_prop *prop, |
17740 | struct type *default_type) | |
80180f79 SA |
17741 | { |
17742 | struct dwarf2_property_baton *baton; | |
518817b3 SM |
17743 | struct obstack *obstack |
17744 | = &cu->per_cu->dwarf2_per_objfile->objfile->objfile_obstack; | |
80180f79 | 17745 | |
9a49df9d AB |
17746 | gdb_assert (default_type != NULL); |
17747 | ||
80180f79 SA |
17748 | if (attr == NULL || prop == NULL) |
17749 | return 0; | |
17750 | ||
17751 | if (attr_form_is_block (attr)) | |
17752 | { | |
8d749320 | 17753 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17754 | baton->property_type = default_type; |
80180f79 SA |
17755 | baton->locexpr.per_cu = cu->per_cu; |
17756 | baton->locexpr.size = DW_BLOCK (attr)->size; | |
17757 | baton->locexpr.data = DW_BLOCK (attr)->data; | |
9a49df9d | 17758 | baton->locexpr.is_reference = false; |
80180f79 SA |
17759 | prop->data.baton = baton; |
17760 | prop->kind = PROP_LOCEXPR; | |
17761 | gdb_assert (prop->data.baton != NULL); | |
17762 | } | |
17763 | else if (attr_form_is_ref (attr)) | |
17764 | { | |
17765 | struct dwarf2_cu *target_cu = cu; | |
17766 | struct die_info *target_die; | |
17767 | struct attribute *target_attr; | |
17768 | ||
17769 | target_die = follow_die_ref (die, attr, &target_cu); | |
17770 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
df25ebbd JB |
17771 | if (target_attr == NULL) |
17772 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, | |
17773 | target_cu); | |
80180f79 SA |
17774 | if (target_attr == NULL) |
17775 | return 0; | |
17776 | ||
df25ebbd | 17777 | switch (target_attr->name) |
80180f79 | 17778 | { |
df25ebbd JB |
17779 | case DW_AT_location: |
17780 | if (attr_form_is_section_offset (target_attr)) | |
17781 | { | |
8d749320 | 17782 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17783 | baton->property_type = die_type (target_die, target_cu); |
df25ebbd JB |
17784 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); |
17785 | prop->data.baton = baton; | |
17786 | prop->kind = PROP_LOCLIST; | |
17787 | gdb_assert (prop->data.baton != NULL); | |
17788 | } | |
17789 | else if (attr_form_is_block (target_attr)) | |
17790 | { | |
8d749320 | 17791 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17792 | baton->property_type = die_type (target_die, target_cu); |
df25ebbd JB |
17793 | baton->locexpr.per_cu = cu->per_cu; |
17794 | baton->locexpr.size = DW_BLOCK (target_attr)->size; | |
17795 | baton->locexpr.data = DW_BLOCK (target_attr)->data; | |
9a49df9d | 17796 | baton->locexpr.is_reference = true; |
df25ebbd JB |
17797 | prop->data.baton = baton; |
17798 | prop->kind = PROP_LOCEXPR; | |
17799 | gdb_assert (prop->data.baton != NULL); | |
17800 | } | |
17801 | else | |
17802 | { | |
17803 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
17804 | "dynamic property"); | |
17805 | return 0; | |
17806 | } | |
17807 | break; | |
17808 | case DW_AT_data_member_location: | |
17809 | { | |
17810 | LONGEST offset; | |
17811 | ||
17812 | if (!handle_data_member_location (target_die, target_cu, | |
17813 | &offset)) | |
17814 | return 0; | |
17815 | ||
8d749320 | 17816 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17817 | baton->property_type = read_type_die (target_die->parent, |
6ad395a7 | 17818 | target_cu); |
df25ebbd JB |
17819 | baton->offset_info.offset = offset; |
17820 | baton->offset_info.type = die_type (target_die, target_cu); | |
17821 | prop->data.baton = baton; | |
17822 | prop->kind = PROP_ADDR_OFFSET; | |
17823 | break; | |
17824 | } | |
80180f79 SA |
17825 | } |
17826 | } | |
17827 | else if (attr_form_is_constant (attr)) | |
17828 | { | |
17829 | prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0); | |
17830 | prop->kind = PROP_CONST; | |
17831 | } | |
17832 | else | |
17833 | { | |
17834 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
17835 | dwarf2_name (die, cu)); | |
17836 | return 0; | |
17837 | } | |
17838 | ||
17839 | return 1; | |
17840 | } | |
17841 | ||
9a49df9d AB |
17842 | /* Find an integer type the same size as the address size given in the |
17843 | compilation unit header for PER_CU. UNSIGNED_P controls if the integer | |
17844 | is unsigned or not. */ | |
17845 | ||
17846 | static struct type * | |
17847 | dwarf2_per_cu_addr_sized_int_type (struct dwarf2_per_cu_data *per_cu, | |
17848 | bool unsigned_p) | |
17849 | { | |
17850 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; | |
17851 | int addr_size = dwarf2_per_cu_addr_size (per_cu); | |
17852 | struct type *int_type; | |
17853 | ||
17854 | /* Helper macro to examine the various builtin types. */ | |
17855 | #define TRY_TYPE(F) \ | |
17856 | int_type = (unsigned_p \ | |
17857 | ? objfile_type (objfile)->builtin_unsigned_ ## F \ | |
17858 | : objfile_type (objfile)->builtin_ ## F); \ | |
17859 | if (int_type != NULL && TYPE_LENGTH (int_type) == addr_size) \ | |
17860 | return int_type | |
17861 | ||
17862 | TRY_TYPE (char); | |
17863 | TRY_TYPE (short); | |
17864 | TRY_TYPE (int); | |
17865 | TRY_TYPE (long); | |
17866 | TRY_TYPE (long_long); | |
17867 | ||
17868 | #undef TRY_TYPE | |
17869 | ||
17870 | gdb_assert_not_reached ("unable to find suitable integer type"); | |
17871 | } | |
17872 | ||
b86352cf AB |
17873 | /* Read the DW_AT_type attribute for a sub-range. If this attribute is not |
17874 | present (which is valid) then compute the default type based on the | |
17875 | compilation units address size. */ | |
17876 | ||
17877 | static struct type * | |
17878 | read_subrange_index_type (struct die_info *die, struct dwarf2_cu *cu) | |
17879 | { | |
17880 | struct type *index_type = die_type (die, cu); | |
17881 | ||
17882 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
17883 | without specifying a base type. | |
17884 | In that case, the base type must be set to the type of | |
17885 | the lower bound, upper bound or count, in that order, if any of these | |
17886 | three attributes references an object that has a type. | |
17887 | If no base type is found, the Dwarf-2 specifications say that | |
17888 | a signed integer type of size equal to the size of an address should | |
17889 | be used. | |
17890 | For the following C code: `extern char gdb_int [];' | |
17891 | GCC produces an empty range DIE. | |
17892 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
17893 | high bound or count are not yet handled by this code. */ | |
17894 | if (TYPE_CODE (index_type) == TYPE_CODE_VOID) | |
9a49df9d | 17895 | index_type = dwarf2_per_cu_addr_sized_int_type (cu->per_cu, false); |
b86352cf AB |
17896 | |
17897 | return index_type; | |
17898 | } | |
17899 | ||
a02abb62 JB |
17900 | /* Read the given DW_AT_subrange DIE. */ |
17901 | ||
f792889a | 17902 | static struct type * |
a02abb62 JB |
17903 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
17904 | { | |
4c9ad8c2 | 17905 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
17906 | struct type *range_type; |
17907 | struct attribute *attr; | |
729efb13 | 17908 | struct dynamic_prop low, high; |
4fae6e18 | 17909 | int low_default_is_valid; |
c451ebe5 | 17910 | int high_bound_is_count = 0; |
15d034d0 | 17911 | const char *name; |
d359392f | 17912 | ULONGEST negative_mask; |
e77813c8 | 17913 | |
b86352cf AB |
17914 | orig_base_type = read_subrange_index_type (die, cu); |
17915 | ||
4c9ad8c2 TT |
17916 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, |
17917 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
17918 | creating the range type, but we use the result of check_typedef | |
17919 | when examining properties of the type. */ | |
17920 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 17921 | |
7e314c57 JK |
17922 | /* The die_type call above may have already set the type for this DIE. */ |
17923 | range_type = get_die_type (die, cu); | |
17924 | if (range_type) | |
17925 | return range_type; | |
17926 | ||
729efb13 SA |
17927 | low.kind = PROP_CONST; |
17928 | high.kind = PROP_CONST; | |
17929 | high.data.const_val = 0; | |
17930 | ||
4fae6e18 JK |
17931 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
17932 | omitting DW_AT_lower_bound. */ | |
17933 | switch (cu->language) | |
6e70227d | 17934 | { |
4fae6e18 JK |
17935 | case language_c: |
17936 | case language_cplus: | |
729efb13 | 17937 | low.data.const_val = 0; |
4fae6e18 JK |
17938 | low_default_is_valid = 1; |
17939 | break; | |
17940 | case language_fortran: | |
729efb13 | 17941 | low.data.const_val = 1; |
4fae6e18 JK |
17942 | low_default_is_valid = 1; |
17943 | break; | |
17944 | case language_d: | |
4fae6e18 | 17945 | case language_objc: |
c44af4eb | 17946 | case language_rust: |
729efb13 | 17947 | low.data.const_val = 0; |
4fae6e18 JK |
17948 | low_default_is_valid = (cu->header.version >= 4); |
17949 | break; | |
17950 | case language_ada: | |
17951 | case language_m2: | |
17952 | case language_pascal: | |
729efb13 | 17953 | low.data.const_val = 1; |
4fae6e18 JK |
17954 | low_default_is_valid = (cu->header.version >= 4); |
17955 | break; | |
17956 | default: | |
729efb13 | 17957 | low.data.const_val = 0; |
4fae6e18 JK |
17958 | low_default_is_valid = 0; |
17959 | break; | |
a02abb62 JB |
17960 | } |
17961 | ||
e142c38c | 17962 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 | 17963 | if (attr) |
9a49df9d | 17964 | attr_to_dynamic_prop (attr, die, cu, &low, base_type); |
4fae6e18 | 17965 | else if (!low_default_is_valid) |
b98664d3 | 17966 | complaint (_("Missing DW_AT_lower_bound " |
9d8780f0 SM |
17967 | "- DIE at %s [in module %s]"), |
17968 | sect_offset_str (die->sect_off), | |
518817b3 | 17969 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
a02abb62 | 17970 | |
506f5c41 TV |
17971 | struct attribute *attr_ub, *attr_count; |
17972 | attr = attr_ub = dwarf2_attr (die, DW_AT_upper_bound, cu); | |
9a49df9d | 17973 | if (!attr_to_dynamic_prop (attr, die, cu, &high, base_type)) |
e77813c8 | 17974 | { |
506f5c41 | 17975 | attr = attr_count = dwarf2_attr (die, DW_AT_count, cu); |
9a49df9d | 17976 | if (attr_to_dynamic_prop (attr, die, cu, &high, base_type)) |
6b662e19 | 17977 | { |
c451ebe5 SA |
17978 | /* If bounds are constant do the final calculation here. */ |
17979 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) | |
17980 | high.data.const_val = low.data.const_val + high.data.const_val - 1; | |
17981 | else | |
17982 | high_bound_is_count = 1; | |
c2ff108b | 17983 | } |
506f5c41 TV |
17984 | else |
17985 | { | |
17986 | if (attr_ub != NULL) | |
17987 | complaint (_("Unresolved DW_AT_upper_bound " | |
17988 | "- DIE at %s [in module %s]"), | |
17989 | sect_offset_str (die->sect_off), | |
17990 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
17991 | if (attr_count != NULL) | |
17992 | complaint (_("Unresolved DW_AT_count " | |
17993 | "- DIE at %s [in module %s]"), | |
17994 | sect_offset_str (die->sect_off), | |
17995 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
17996 | } | |
e77813c8 | 17997 | } |
a02abb62 | 17998 | |
4e962e74 TT |
17999 | LONGEST bias = 0; |
18000 | struct attribute *bias_attr = dwarf2_attr (die, DW_AT_GNU_bias, cu); | |
18001 | if (bias_attr != nullptr && attr_form_is_constant (bias_attr)) | |
18002 | bias = dwarf2_get_attr_constant_value (bias_attr, 0); | |
18003 | ||
dbb9c2b1 JB |
18004 | /* Normally, the DWARF producers are expected to use a signed |
18005 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
18006 | But this is unfortunately not always the case, as witnessed | |
18007 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
18008 | is used instead. To work around that ambiguity, we treat | |
18009 | the bounds as signed, and thus sign-extend their values, when | |
18010 | the base type is signed. */ | |
6e70227d | 18011 | negative_mask = |
d359392f | 18012 | -((ULONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
729efb13 SA |
18013 | if (low.kind == PROP_CONST |
18014 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) | |
18015 | low.data.const_val |= negative_mask; | |
18016 | if (high.kind == PROP_CONST | |
18017 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) | |
18018 | high.data.const_val |= negative_mask; | |
43bbcdc2 | 18019 | |
4e962e74 | 18020 | range_type = create_range_type (NULL, orig_base_type, &low, &high, bias); |
a02abb62 | 18021 | |
c451ebe5 SA |
18022 | if (high_bound_is_count) |
18023 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; | |
18024 | ||
c2ff108b JK |
18025 | /* Ada expects an empty array on no boundary attributes. */ |
18026 | if (attr == NULL && cu->language != language_ada) | |
729efb13 | 18027 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
c2ff108b | 18028 | |
39cbfefa DJ |
18029 | name = dwarf2_name (die, cu); |
18030 | if (name) | |
18031 | TYPE_NAME (range_type) = name; | |
6e70227d | 18032 | |
e142c38c | 18033 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
18034 | if (attr) |
18035 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
18036 | ||
2b4424c3 TT |
18037 | maybe_set_alignment (cu, die, range_type); |
18038 | ||
7e314c57 JK |
18039 | set_die_type (die, range_type, cu); |
18040 | ||
18041 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
18042 | set_descriptive_type (range_type, die, cu); |
18043 | ||
7e314c57 | 18044 | return range_type; |
a02abb62 | 18045 | } |
6e70227d | 18046 | |
f792889a | 18047 | static struct type * |
81a17f79 JB |
18048 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
18049 | { | |
18050 | struct type *type; | |
81a17f79 | 18051 | |
518817b3 SM |
18052 | type = init_type (cu->per_cu->dwarf2_per_objfile->objfile, TYPE_CODE_VOID,0, |
18053 | NULL); | |
0114d602 | 18054 | TYPE_NAME (type) = dwarf2_name (die, cu); |
81a17f79 | 18055 | |
74a2f8ff JB |
18056 | /* In Ada, an unspecified type is typically used when the description |
18057 | of the type is defered to a different unit. When encountering | |
18058 | such a type, we treat it as a stub, and try to resolve it later on, | |
18059 | when needed. */ | |
18060 | if (cu->language == language_ada) | |
18061 | TYPE_STUB (type) = 1; | |
18062 | ||
f792889a | 18063 | return set_die_type (die, type, cu); |
81a17f79 | 18064 | } |
a02abb62 | 18065 | |
639d11d3 DC |
18066 | /* Read a single die and all its descendents. Set the die's sibling |
18067 | field to NULL; set other fields in the die correctly, and set all | |
18068 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
18069 | location of the info_ptr after reading all of those dies. PARENT | |
18070 | is the parent of the die in question. */ | |
18071 | ||
18072 | static struct die_info * | |
dee91e82 | 18073 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
18074 | const gdb_byte *info_ptr, |
18075 | const gdb_byte **new_info_ptr, | |
dee91e82 | 18076 | struct die_info *parent) |
639d11d3 DC |
18077 | { |
18078 | struct die_info *die; | |
d521ce57 | 18079 | const gdb_byte *cur_ptr; |
639d11d3 DC |
18080 | int has_children; |
18081 | ||
bf6af496 | 18082 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0); |
1d325ec1 DJ |
18083 | if (die == NULL) |
18084 | { | |
18085 | *new_info_ptr = cur_ptr; | |
18086 | return NULL; | |
18087 | } | |
93311388 | 18088 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
18089 | |
18090 | if (has_children) | |
bf6af496 | 18091 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
18092 | else |
18093 | { | |
18094 | die->child = NULL; | |
18095 | *new_info_ptr = cur_ptr; | |
18096 | } | |
18097 | ||
18098 | die->sibling = NULL; | |
18099 | die->parent = parent; | |
18100 | return die; | |
18101 | } | |
18102 | ||
18103 | /* Read a die, all of its descendents, and all of its siblings; set | |
18104 | all of the fields of all of the dies correctly. Arguments are as | |
18105 | in read_die_and_children. */ | |
18106 | ||
18107 | static struct die_info * | |
bf6af496 | 18108 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
18109 | const gdb_byte *info_ptr, |
18110 | const gdb_byte **new_info_ptr, | |
bf6af496 | 18111 | struct die_info *parent) |
639d11d3 DC |
18112 | { |
18113 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 18114 | const gdb_byte *cur_ptr; |
639d11d3 | 18115 | |
c906108c | 18116 | cur_ptr = info_ptr; |
639d11d3 DC |
18117 | first_die = last_sibling = NULL; |
18118 | ||
18119 | while (1) | |
c906108c | 18120 | { |
639d11d3 | 18121 | struct die_info *die |
dee91e82 | 18122 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 18123 | |
1d325ec1 | 18124 | if (die == NULL) |
c906108c | 18125 | { |
639d11d3 DC |
18126 | *new_info_ptr = cur_ptr; |
18127 | return first_die; | |
c906108c | 18128 | } |
1d325ec1 DJ |
18129 | |
18130 | if (!first_die) | |
18131 | first_die = die; | |
c906108c | 18132 | else |
1d325ec1 DJ |
18133 | last_sibling->sibling = die; |
18134 | ||
18135 | last_sibling = die; | |
c906108c | 18136 | } |
c906108c SS |
18137 | } |
18138 | ||
bf6af496 DE |
18139 | /* Read a die, all of its descendents, and all of its siblings; set |
18140 | all of the fields of all of the dies correctly. Arguments are as | |
18141 | in read_die_and_children. | |
18142 | This the main entry point for reading a DIE and all its children. */ | |
18143 | ||
18144 | static struct die_info * | |
18145 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
18146 | const gdb_byte *info_ptr, |
18147 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
18148 | struct die_info *parent) |
18149 | { | |
18150 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
18151 | new_info_ptr, parent); | |
18152 | ||
b4f54984 | 18153 | if (dwarf_die_debug) |
bf6af496 DE |
18154 | { |
18155 | fprintf_unfiltered (gdb_stdlog, | |
18156 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 18157 | get_section_name (reader->die_section), |
bf6af496 DE |
18158 | (unsigned) (info_ptr - reader->die_section->buffer), |
18159 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 18160 | dump_die (die, dwarf_die_debug); |
bf6af496 DE |
18161 | } |
18162 | ||
18163 | return die; | |
18164 | } | |
18165 | ||
3019eac3 DE |
18166 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
18167 | attributes. | |
18168 | The caller is responsible for filling in the extra attributes | |
18169 | and updating (*DIEP)->num_attrs. | |
18170 | Set DIEP to point to a newly allocated die with its information, | |
18171 | except for its child, sibling, and parent fields. | |
18172 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
93311388 | 18173 | |
d521ce57 | 18174 | static const gdb_byte * |
3019eac3 | 18175 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 18176 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 | 18177 | int *has_children, int num_extra_attrs) |
93311388 | 18178 | { |
b64f50a1 | 18179 | unsigned int abbrev_number, bytes_read, i; |
93311388 DE |
18180 | struct abbrev_info *abbrev; |
18181 | struct die_info *die; | |
18182 | struct dwarf2_cu *cu = reader->cu; | |
18183 | bfd *abfd = reader->abfd; | |
18184 | ||
9c541725 | 18185 | sect_offset sect_off = (sect_offset) (info_ptr - reader->buffer); |
93311388 DE |
18186 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
18187 | info_ptr += bytes_read; | |
18188 | if (!abbrev_number) | |
18189 | { | |
18190 | *diep = NULL; | |
18191 | *has_children = 0; | |
18192 | return info_ptr; | |
18193 | } | |
18194 | ||
685af9cd | 18195 | abbrev = reader->abbrev_table->lookup_abbrev (abbrev_number); |
93311388 | 18196 | if (!abbrev) |
348e048f DE |
18197 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
18198 | abbrev_number, | |
18199 | bfd_get_filename (abfd)); | |
18200 | ||
3019eac3 | 18201 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
9c541725 | 18202 | die->sect_off = sect_off; |
93311388 DE |
18203 | die->tag = abbrev->tag; |
18204 | die->abbrev = abbrev_number; | |
18205 | ||
3019eac3 DE |
18206 | /* Make the result usable. |
18207 | The caller needs to update num_attrs after adding the extra | |
18208 | attributes. */ | |
93311388 DE |
18209 | die->num_attrs = abbrev->num_attrs; |
18210 | ||
18211 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
18212 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
18213 | info_ptr); | |
93311388 DE |
18214 | |
18215 | *diep = die; | |
18216 | *has_children = abbrev->has_children; | |
18217 | return info_ptr; | |
18218 | } | |
18219 | ||
3019eac3 DE |
18220 | /* Read a die and all its attributes. |
18221 | Set DIEP to point to a newly allocated die with its information, | |
18222 | except for its child, sibling, and parent fields. | |
18223 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
18224 | ||
d521ce57 | 18225 | static const gdb_byte * |
3019eac3 | 18226 | read_full_die (const struct die_reader_specs *reader, |
d521ce57 | 18227 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 DE |
18228 | int *has_children) |
18229 | { | |
d521ce57 | 18230 | const gdb_byte *result; |
bf6af496 DE |
18231 | |
18232 | result = read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
18233 | ||
b4f54984 | 18234 | if (dwarf_die_debug) |
bf6af496 DE |
18235 | { |
18236 | fprintf_unfiltered (gdb_stdlog, | |
18237 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 18238 | get_section_name (reader->die_section), |
bf6af496 DE |
18239 | (unsigned) (info_ptr - reader->die_section->buffer), |
18240 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 18241 | dump_die (*diep, dwarf_die_debug); |
bf6af496 DE |
18242 | } |
18243 | ||
18244 | return result; | |
3019eac3 | 18245 | } |
433df2d4 DE |
18246 | \f |
18247 | /* Abbreviation tables. | |
3019eac3 | 18248 | |
433df2d4 | 18249 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
18250 | stored in a separate .debug_abbrev section. Before we read any |
18251 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
18252 | in a hash table. */ |
18253 | ||
18254 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
18255 | ||
685af9cd TT |
18256 | struct abbrev_info * |
18257 | abbrev_table::alloc_abbrev () | |
433df2d4 DE |
18258 | { |
18259 | struct abbrev_info *abbrev; | |
18260 | ||
685af9cd | 18261 | abbrev = XOBNEW (&abbrev_obstack, struct abbrev_info); |
433df2d4 | 18262 | memset (abbrev, 0, sizeof (struct abbrev_info)); |
8d749320 | 18263 | |
433df2d4 DE |
18264 | return abbrev; |
18265 | } | |
18266 | ||
18267 | /* Add an abbreviation to the table. */ | |
c906108c | 18268 | |
685af9cd TT |
18269 | void |
18270 | abbrev_table::add_abbrev (unsigned int abbrev_number, | |
18271 | struct abbrev_info *abbrev) | |
433df2d4 DE |
18272 | { |
18273 | unsigned int hash_number; | |
18274 | ||
18275 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
4a17f768 YQ |
18276 | abbrev->next = m_abbrevs[hash_number]; |
18277 | m_abbrevs[hash_number] = abbrev; | |
433df2d4 | 18278 | } |
dee91e82 | 18279 | |
433df2d4 DE |
18280 | /* Look up an abbrev in the table. |
18281 | Returns NULL if the abbrev is not found. */ | |
18282 | ||
685af9cd TT |
18283 | struct abbrev_info * |
18284 | abbrev_table::lookup_abbrev (unsigned int abbrev_number) | |
c906108c | 18285 | { |
433df2d4 DE |
18286 | unsigned int hash_number; |
18287 | struct abbrev_info *abbrev; | |
18288 | ||
18289 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
4a17f768 | 18290 | abbrev = m_abbrevs[hash_number]; |
433df2d4 DE |
18291 | |
18292 | while (abbrev) | |
18293 | { | |
18294 | if (abbrev->number == abbrev_number) | |
18295 | return abbrev; | |
18296 | abbrev = abbrev->next; | |
18297 | } | |
18298 | return NULL; | |
18299 | } | |
18300 | ||
18301 | /* Read in an abbrev table. */ | |
18302 | ||
685af9cd | 18303 | static abbrev_table_up |
ed2dc618 SM |
18304 | abbrev_table_read_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
18305 | struct dwarf2_section_info *section, | |
9c541725 | 18306 | sect_offset sect_off) |
433df2d4 DE |
18307 | { |
18308 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
a32a8923 | 18309 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 18310 | const gdb_byte *abbrev_ptr; |
c906108c SS |
18311 | struct abbrev_info *cur_abbrev; |
18312 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 18313 | unsigned int abbrev_form; |
f3dd6933 DJ |
18314 | struct attr_abbrev *cur_attrs; |
18315 | unsigned int allocated_attrs; | |
c906108c | 18316 | |
685af9cd | 18317 | abbrev_table_up abbrev_table (new struct abbrev_table (sect_off)); |
c906108c | 18318 | |
433df2d4 | 18319 | dwarf2_read_section (objfile, section); |
9c541725 | 18320 | abbrev_ptr = section->buffer + to_underlying (sect_off); |
c906108c SS |
18321 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
18322 | abbrev_ptr += bytes_read; | |
18323 | ||
f3dd6933 | 18324 | allocated_attrs = ATTR_ALLOC_CHUNK; |
8d749320 | 18325 | cur_attrs = XNEWVEC (struct attr_abbrev, allocated_attrs); |
6e70227d | 18326 | |
0963b4bd | 18327 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
18328 | while (abbrev_number) |
18329 | { | |
685af9cd | 18330 | cur_abbrev = abbrev_table->alloc_abbrev (); |
c906108c SS |
18331 | |
18332 | /* read in abbrev header */ | |
18333 | cur_abbrev->number = abbrev_number; | |
aead7601 SM |
18334 | cur_abbrev->tag |
18335 | = (enum dwarf_tag) read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
c906108c SS |
18336 | abbrev_ptr += bytes_read; |
18337 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
18338 | abbrev_ptr += 1; | |
18339 | ||
18340 | /* now read in declarations */ | |
22d2f3ab | 18341 | for (;;) |
c906108c | 18342 | { |
43988095 JK |
18343 | LONGEST implicit_const; |
18344 | ||
22d2f3ab JK |
18345 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
18346 | abbrev_ptr += bytes_read; | |
18347 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
18348 | abbrev_ptr += bytes_read; | |
43988095 JK |
18349 | if (abbrev_form == DW_FORM_implicit_const) |
18350 | { | |
18351 | implicit_const = read_signed_leb128 (abfd, abbrev_ptr, | |
18352 | &bytes_read); | |
18353 | abbrev_ptr += bytes_read; | |
18354 | } | |
18355 | else | |
18356 | { | |
18357 | /* Initialize it due to a false compiler warning. */ | |
18358 | implicit_const = -1; | |
18359 | } | |
22d2f3ab JK |
18360 | |
18361 | if (abbrev_name == 0) | |
18362 | break; | |
18363 | ||
f3dd6933 | 18364 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 18365 | { |
f3dd6933 DJ |
18366 | allocated_attrs += ATTR_ALLOC_CHUNK; |
18367 | cur_attrs | |
224c3ddb | 18368 | = XRESIZEVEC (struct attr_abbrev, cur_attrs, allocated_attrs); |
c906108c | 18369 | } |
ae038cb0 | 18370 | |
aead7601 SM |
18371 | cur_attrs[cur_abbrev->num_attrs].name |
18372 | = (enum dwarf_attribute) abbrev_name; | |
22d2f3ab | 18373 | cur_attrs[cur_abbrev->num_attrs].form |
aead7601 | 18374 | = (enum dwarf_form) abbrev_form; |
43988095 | 18375 | cur_attrs[cur_abbrev->num_attrs].implicit_const = implicit_const; |
22d2f3ab | 18376 | ++cur_abbrev->num_attrs; |
c906108c SS |
18377 | } |
18378 | ||
8d749320 SM |
18379 | cur_abbrev->attrs = |
18380 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct attr_abbrev, | |
18381 | cur_abbrev->num_attrs); | |
f3dd6933 DJ |
18382 | memcpy (cur_abbrev->attrs, cur_attrs, |
18383 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
18384 | ||
685af9cd | 18385 | abbrev_table->add_abbrev (abbrev_number, cur_abbrev); |
c906108c SS |
18386 | |
18387 | /* Get next abbreviation. | |
18388 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
18389 | always properly terminated with an abbrev number of 0. |
18390 | Exit loop if we encounter an abbreviation which we have | |
18391 | already read (which means we are about to read the abbreviations | |
18392 | for the next compile unit) or if the end of the abbreviation | |
18393 | table is reached. */ | |
433df2d4 | 18394 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
18395 | break; |
18396 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
18397 | abbrev_ptr += bytes_read; | |
685af9cd | 18398 | if (abbrev_table->lookup_abbrev (abbrev_number) != NULL) |
c906108c SS |
18399 | break; |
18400 | } | |
f3dd6933 DJ |
18401 | |
18402 | xfree (cur_attrs); | |
433df2d4 | 18403 | return abbrev_table; |
c906108c SS |
18404 | } |
18405 | ||
72bf9492 DJ |
18406 | /* Returns nonzero if TAG represents a type that we might generate a partial |
18407 | symbol for. */ | |
18408 | ||
18409 | static int | |
18410 | is_type_tag_for_partial (int tag) | |
18411 | { | |
18412 | switch (tag) | |
18413 | { | |
18414 | #if 0 | |
18415 | /* Some types that would be reasonable to generate partial symbols for, | |
18416 | that we don't at present. */ | |
18417 | case DW_TAG_array_type: | |
18418 | case DW_TAG_file_type: | |
18419 | case DW_TAG_ptr_to_member_type: | |
18420 | case DW_TAG_set_type: | |
18421 | case DW_TAG_string_type: | |
18422 | case DW_TAG_subroutine_type: | |
18423 | #endif | |
18424 | case DW_TAG_base_type: | |
18425 | case DW_TAG_class_type: | |
680b30c7 | 18426 | case DW_TAG_interface_type: |
72bf9492 DJ |
18427 | case DW_TAG_enumeration_type: |
18428 | case DW_TAG_structure_type: | |
18429 | case DW_TAG_subrange_type: | |
18430 | case DW_TAG_typedef: | |
18431 | case DW_TAG_union_type: | |
18432 | return 1; | |
18433 | default: | |
18434 | return 0; | |
18435 | } | |
18436 | } | |
18437 | ||
18438 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
18439 | ||
18440 | static struct partial_die_info * | |
dee91e82 | 18441 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 18442 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 18443 | { |
dee91e82 | 18444 | struct dwarf2_cu *cu = reader->cu; |
518817b3 | 18445 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
72bf9492 | 18446 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; |
72bf9492 | 18447 | unsigned int bytes_read; |
5afb4e99 | 18448 | unsigned int load_all = 0; |
72bf9492 DJ |
18449 | int nesting_level = 1; |
18450 | ||
18451 | parent_die = NULL; | |
18452 | last_die = NULL; | |
18453 | ||
7adf1e79 DE |
18454 | gdb_assert (cu->per_cu != NULL); |
18455 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
18456 | load_all = 1; |
18457 | ||
72bf9492 DJ |
18458 | cu->partial_dies |
18459 | = htab_create_alloc_ex (cu->header.length / 12, | |
18460 | partial_die_hash, | |
18461 | partial_die_eq, | |
18462 | NULL, | |
18463 | &cu->comp_unit_obstack, | |
18464 | hashtab_obstack_allocate, | |
18465 | dummy_obstack_deallocate); | |
18466 | ||
72bf9492 DJ |
18467 | while (1) |
18468 | { | |
685af9cd | 18469 | abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, &bytes_read); |
72bf9492 DJ |
18470 | |
18471 | /* A NULL abbrev means the end of a series of children. */ | |
18472 | if (abbrev == NULL) | |
18473 | { | |
18474 | if (--nesting_level == 0) | |
cd9983dd YQ |
18475 | return first_die; |
18476 | ||
72bf9492 DJ |
18477 | info_ptr += bytes_read; |
18478 | last_die = parent_die; | |
18479 | parent_die = parent_die->die_parent; | |
18480 | continue; | |
18481 | } | |
18482 | ||
98bfdba5 PA |
18483 | /* Check for template arguments. We never save these; if |
18484 | they're seen, we just mark the parent, and go on our way. */ | |
18485 | if (parent_die != NULL | |
18486 | && cu->language == language_cplus | |
18487 | && (abbrev->tag == DW_TAG_template_type_param | |
18488 | || abbrev->tag == DW_TAG_template_value_param)) | |
18489 | { | |
18490 | parent_die->has_template_arguments = 1; | |
18491 | ||
18492 | if (!load_all) | |
18493 | { | |
18494 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 18495 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
18496 | continue; |
18497 | } | |
18498 | } | |
18499 | ||
0d99eb77 | 18500 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
18501 | Skip their other children. */ |
18502 | if (!load_all | |
18503 | && cu->language == language_cplus | |
18504 | && parent_die != NULL | |
18505 | && parent_die->tag == DW_TAG_subprogram) | |
18506 | { | |
dee91e82 | 18507 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
18508 | continue; |
18509 | } | |
18510 | ||
5afb4e99 DJ |
18511 | /* Check whether this DIE is interesting enough to save. Normally |
18512 | we would not be interested in members here, but there may be | |
18513 | later variables referencing them via DW_AT_specification (for | |
18514 | static members). */ | |
18515 | if (!load_all | |
18516 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 18517 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
18518 | && abbrev->tag != DW_TAG_enumerator |
18519 | && abbrev->tag != DW_TAG_subprogram | |
b1dc1806 | 18520 | && abbrev->tag != DW_TAG_inlined_subroutine |
bc30ff58 | 18521 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 18522 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 18523 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 18524 | && abbrev->tag != DW_TAG_module |
95554aad | 18525 | && abbrev->tag != DW_TAG_member |
74921315 KS |
18526 | && abbrev->tag != DW_TAG_imported_unit |
18527 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
18528 | { |
18529 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 18530 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
18531 | continue; |
18532 | } | |
18533 | ||
6f06d47b YQ |
18534 | struct partial_die_info pdi ((sect_offset) (info_ptr - reader->buffer), |
18535 | abbrev); | |
cd9983dd | 18536 | |
48fbe735 | 18537 | info_ptr = pdi.read (reader, *abbrev, info_ptr + bytes_read); |
72bf9492 DJ |
18538 | |
18539 | /* This two-pass algorithm for processing partial symbols has a | |
18540 | high cost in cache pressure. Thus, handle some simple cases | |
18541 | here which cover the majority of C partial symbols. DIEs | |
18542 | which neither have specification tags in them, nor could have | |
18543 | specification tags elsewhere pointing at them, can simply be | |
18544 | processed and discarded. | |
18545 | ||
18546 | This segment is also optional; scan_partial_symbols and | |
18547 | add_partial_symbol will handle these DIEs if we chain | |
18548 | them in normally. When compilers which do not emit large | |
18549 | quantities of duplicate debug information are more common, | |
18550 | this code can probably be removed. */ | |
18551 | ||
18552 | /* Any complete simple types at the top level (pretty much all | |
18553 | of them, for a language without namespaces), can be processed | |
18554 | directly. */ | |
18555 | if (parent_die == NULL | |
cd9983dd YQ |
18556 | && pdi.has_specification == 0 |
18557 | && pdi.is_declaration == 0 | |
18558 | && ((pdi.tag == DW_TAG_typedef && !pdi.has_children) | |
18559 | || pdi.tag == DW_TAG_base_type | |
18560 | || pdi.tag == DW_TAG_subrange_type)) | |
72bf9492 | 18561 | { |
cd9983dd | 18562 | if (building_psymtab && pdi.name != NULL) |
67547d89 | 18563 | add_psymbol_to_list (pdi.name, strlen (pdi.name), false, |
79748972 | 18564 | VAR_DOMAIN, LOC_TYPEDEF, -1, |
75aedd27 | 18565 | psymbol_placement::STATIC, |
1762568f | 18566 | 0, cu->language, objfile); |
cd9983dd | 18567 | info_ptr = locate_pdi_sibling (reader, &pdi, info_ptr); |
72bf9492 DJ |
18568 | continue; |
18569 | } | |
18570 | ||
d8228535 JK |
18571 | /* The exception for DW_TAG_typedef with has_children above is |
18572 | a workaround of GCC PR debug/47510. In the case of this complaint | |
a737d952 | 18573 | type_name_or_error will error on such types later. |
d8228535 JK |
18574 | |
18575 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
18576 | it could not find the child DIEs referenced later, this is checked | |
18577 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
18578 | ||
cd9983dd | 18579 | if (pdi.tag == DW_TAG_typedef && pdi.has_children) |
b98664d3 | 18580 | complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug " |
9d8780f0 | 18581 | "- DIE at %s [in module %s]"), |
cd9983dd | 18582 | sect_offset_str (pdi.sect_off), objfile_name (objfile)); |
d8228535 | 18583 | |
72bf9492 DJ |
18584 | /* If we're at the second level, and we're an enumerator, and |
18585 | our parent has no specification (meaning possibly lives in a | |
18586 | namespace elsewhere), then we can add the partial symbol now | |
18587 | instead of queueing it. */ | |
cd9983dd | 18588 | if (pdi.tag == DW_TAG_enumerator |
72bf9492 DJ |
18589 | && parent_die != NULL |
18590 | && parent_die->die_parent == NULL | |
18591 | && parent_die->tag == DW_TAG_enumeration_type | |
18592 | && parent_die->has_specification == 0) | |
18593 | { | |
cd9983dd | 18594 | if (pdi.name == NULL) |
b98664d3 | 18595 | complaint (_("malformed enumerator DIE ignored")); |
72bf9492 | 18596 | else if (building_psymtab) |
67547d89 | 18597 | add_psymbol_to_list (pdi.name, strlen (pdi.name), false, |
79748972 | 18598 | VAR_DOMAIN, LOC_CONST, -1, |
9c37b5ae | 18599 | cu->language == language_cplus |
75aedd27 TT |
18600 | ? psymbol_placement::GLOBAL |
18601 | : psymbol_placement::STATIC, | |
1762568f | 18602 | 0, cu->language, objfile); |
72bf9492 | 18603 | |
cd9983dd | 18604 | info_ptr = locate_pdi_sibling (reader, &pdi, info_ptr); |
72bf9492 DJ |
18605 | continue; |
18606 | } | |
18607 | ||
cd9983dd | 18608 | struct partial_die_info *part_die |
6f06d47b | 18609 | = new (&cu->comp_unit_obstack) partial_die_info (pdi); |
cd9983dd | 18610 | |
72bf9492 DJ |
18611 | /* We'll save this DIE so link it in. */ |
18612 | part_die->die_parent = parent_die; | |
18613 | part_die->die_sibling = NULL; | |
18614 | part_die->die_child = NULL; | |
18615 | ||
18616 | if (last_die && last_die == parent_die) | |
18617 | last_die->die_child = part_die; | |
18618 | else if (last_die) | |
18619 | last_die->die_sibling = part_die; | |
18620 | ||
18621 | last_die = part_die; | |
18622 | ||
18623 | if (first_die == NULL) | |
18624 | first_die = part_die; | |
18625 | ||
18626 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
18627 | find interesting need to be in the hash table, because we | |
18628 | also have the parent/sibling/child chains; only those that we | |
18629 | might refer to by offset later during partial symbol reading. | |
18630 | ||
18631 | For now this means things that might have be the target of a | |
18632 | DW_AT_specification, DW_AT_abstract_origin, or | |
18633 | DW_AT_extension. DW_AT_extension will refer only to | |
18634 | namespaces; DW_AT_abstract_origin refers to functions (and | |
18635 | many things under the function DIE, but we do not recurse | |
18636 | into function DIEs during partial symbol reading) and | |
18637 | possibly variables as well; DW_AT_specification refers to | |
18638 | declarations. Declarations ought to have the DW_AT_declaration | |
18639 | flag. It happens that GCC forgets to put it in sometimes, but | |
18640 | only for functions, not for types. | |
18641 | ||
18642 | Adding more things than necessary to the hash table is harmless | |
18643 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
18644 | wasted time in find_partial_die, when we reread the compilation |
18645 | unit with load_all_dies set. */ | |
72bf9492 | 18646 | |
5afb4e99 | 18647 | if (load_all |
72929c62 | 18648 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 18649 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
18650 | || abbrev->tag == DW_TAG_variable |
18651 | || abbrev->tag == DW_TAG_namespace | |
18652 | || part_die->is_declaration) | |
18653 | { | |
18654 | void **slot; | |
18655 | ||
18656 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
9c541725 PA |
18657 | to_underlying (part_die->sect_off), |
18658 | INSERT); | |
72bf9492 DJ |
18659 | *slot = part_die; |
18660 | } | |
18661 | ||
72bf9492 | 18662 | /* For some DIEs we want to follow their children (if any). For C |
bc30ff58 | 18663 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
18664 | languages we have to, so that we can get at method physnames |
18665 | to infer fully qualified class names, for DW_AT_specification, | |
18666 | and for C++ template arguments. For C++, we also look one level | |
18667 | inside functions to find template arguments (if the name of the | |
18668 | function does not already contain the template arguments). | |
bc30ff58 | 18669 | |
0a4b0913 AB |
18670 | For Ada and Fortran, we need to scan the children of subprograms |
18671 | and lexical blocks as well because these languages allow the | |
18672 | definition of nested entities that could be interesting for the | |
18673 | debugger, such as nested subprograms for instance. */ | |
72bf9492 | 18674 | if (last_die->has_children |
5afb4e99 DJ |
18675 | && (load_all |
18676 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 18677 | || last_die->tag == DW_TAG_module |
72bf9492 | 18678 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
18679 | || (cu->language == language_cplus |
18680 | && last_die->tag == DW_TAG_subprogram | |
18681 | && (last_die->name == NULL | |
18682 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
18683 | || (cu->language != language_c |
18684 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 18685 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 18686 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 | 18687 | || last_die->tag == DW_TAG_union_type)) |
0a4b0913 AB |
18688 | || ((cu->language == language_ada |
18689 | || cu->language == language_fortran) | |
bc30ff58 JB |
18690 | && (last_die->tag == DW_TAG_subprogram |
18691 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
18692 | { |
18693 | nesting_level++; | |
18694 | parent_die = last_die; | |
18695 | continue; | |
18696 | } | |
18697 | ||
18698 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 18699 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
18700 | |
18701 | /* Back to the top, do it again. */ | |
18702 | } | |
18703 | } | |
18704 | ||
6f06d47b YQ |
18705 | partial_die_info::partial_die_info (sect_offset sect_off_, |
18706 | struct abbrev_info *abbrev) | |
18707 | : partial_die_info (sect_off_, abbrev->tag, abbrev->has_children) | |
18708 | { | |
18709 | } | |
18710 | ||
35cc7ed7 YQ |
18711 | /* Read a minimal amount of information into the minimal die structure. |
18712 | INFO_PTR should point just after the initial uleb128 of a DIE. */ | |
c906108c | 18713 | |
48fbe735 YQ |
18714 | const gdb_byte * |
18715 | partial_die_info::read (const struct die_reader_specs *reader, | |
18716 | const struct abbrev_info &abbrev, const gdb_byte *info_ptr) | |
c906108c | 18717 | { |
dee91e82 | 18718 | struct dwarf2_cu *cu = reader->cu; |
518817b3 SM |
18719 | struct dwarf2_per_objfile *dwarf2_per_objfile |
18720 | = cu->per_cu->dwarf2_per_objfile; | |
fa238c03 | 18721 | unsigned int i; |
c5aa993b | 18722 | int has_low_pc_attr = 0; |
c906108c | 18723 | int has_high_pc_attr = 0; |
91da1414 | 18724 | int high_pc_relative = 0; |
c906108c | 18725 | |
fd0a254f | 18726 | for (i = 0; i < abbrev.num_attrs; ++i) |
c906108c | 18727 | { |
48fbe735 YQ |
18728 | struct attribute attr; |
18729 | ||
fd0a254f | 18730 | info_ptr = read_attribute (reader, &attr, &abbrev.attrs[i], info_ptr); |
c906108c SS |
18731 | |
18732 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 18733 | partial symbol table. */ |
c906108c SS |
18734 | switch (attr.name) |
18735 | { | |
18736 | case DW_AT_name: | |
48fbe735 | 18737 | switch (tag) |
71c25dea TT |
18738 | { |
18739 | case DW_TAG_compile_unit: | |
95554aad | 18740 | case DW_TAG_partial_unit: |
348e048f | 18741 | case DW_TAG_type_unit: |
71c25dea TT |
18742 | /* Compilation units have a DW_AT_name that is a filename, not |
18743 | a source language identifier. */ | |
18744 | case DW_TAG_enumeration_type: | |
18745 | case DW_TAG_enumerator: | |
18746 | /* These tags always have simple identifiers already; no need | |
18747 | to canonicalize them. */ | |
48fbe735 | 18748 | name = DW_STRING (&attr); |
71c25dea TT |
18749 | break; |
18750 | default: | |
48fbe735 YQ |
18751 | { |
18752 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
18753 | ||
18754 | name | |
18755 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
18756 | &objfile->per_bfd->storage_obstack); | |
18757 | } | |
71c25dea TT |
18758 | break; |
18759 | } | |
c906108c | 18760 | break; |
31ef98ae | 18761 | case DW_AT_linkage_name: |
c906108c | 18762 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
18763 | /* Note that both forms of linkage name might appear. We |
18764 | assume they will be the same, and we only store the last | |
18765 | one we see. */ | |
48fbe735 | 18766 | linkage_name = DW_STRING (&attr); |
c906108c SS |
18767 | break; |
18768 | case DW_AT_low_pc: | |
18769 | has_low_pc_attr = 1; | |
48fbe735 | 18770 | lowpc = attr_value_as_address (&attr); |
c906108c SS |
18771 | break; |
18772 | case DW_AT_high_pc: | |
18773 | has_high_pc_attr = 1; | |
48fbe735 | 18774 | highpc = attr_value_as_address (&attr); |
31aa7e4e JB |
18775 | if (cu->header.version >= 4 && attr_form_is_constant (&attr)) |
18776 | high_pc_relative = 1; | |
c906108c SS |
18777 | break; |
18778 | case DW_AT_location: | |
0963b4bd | 18779 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
18780 | if (attr_form_is_block (&attr)) |
18781 | { | |
48fbe735 | 18782 | d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 18783 | } |
3690dd37 | 18784 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 18785 | { |
4d3c2250 | 18786 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
18787 | } |
18788 | else | |
18789 | { | |
4d3c2250 KB |
18790 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
18791 | "partial symbol information"); | |
8e19ed76 | 18792 | } |
c906108c | 18793 | break; |
c906108c | 18794 | case DW_AT_external: |
48fbe735 | 18795 | is_external = DW_UNSND (&attr); |
c906108c SS |
18796 | break; |
18797 | case DW_AT_declaration: | |
48fbe735 | 18798 | is_declaration = DW_UNSND (&attr); |
c906108c SS |
18799 | break; |
18800 | case DW_AT_type: | |
48fbe735 | 18801 | has_type = 1; |
c906108c SS |
18802 | break; |
18803 | case DW_AT_abstract_origin: | |
18804 | case DW_AT_specification: | |
72bf9492 | 18805 | case DW_AT_extension: |
48fbe735 YQ |
18806 | has_specification = 1; |
18807 | spec_offset = dwarf2_get_ref_die_offset (&attr); | |
18808 | spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
36586728 | 18809 | || cu->per_cu->is_dwz); |
c906108c SS |
18810 | break; |
18811 | case DW_AT_sibling: | |
18812 | /* Ignore absolute siblings, they might point outside of | |
18813 | the current compile unit. */ | |
18814 | if (attr.form == DW_FORM_ref_addr) | |
b98664d3 | 18815 | complaint (_("ignoring absolute DW_AT_sibling")); |
c906108c | 18816 | else |
b9502d3f | 18817 | { |
48fbe735 | 18818 | const gdb_byte *buffer = reader->buffer; |
9c541725 PA |
18819 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
18820 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
18821 | |
18822 | if (sibling_ptr < info_ptr) | |
b98664d3 | 18823 | complaint (_("DW_AT_sibling points backwards")); |
22869d73 KS |
18824 | else if (sibling_ptr > reader->buffer_end) |
18825 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f | 18826 | else |
48fbe735 | 18827 | sibling = sibling_ptr; |
b9502d3f | 18828 | } |
c906108c | 18829 | break; |
fa4028e9 | 18830 | case DW_AT_byte_size: |
48fbe735 | 18831 | has_byte_size = 1; |
fa4028e9 | 18832 | break; |
ff908ebf | 18833 | case DW_AT_const_value: |
48fbe735 | 18834 | has_const_value = 1; |
ff908ebf | 18835 | break; |
68511cec CES |
18836 | case DW_AT_calling_convention: |
18837 | /* DWARF doesn't provide a way to identify a program's source-level | |
18838 | entry point. DW_AT_calling_convention attributes are only meant | |
18839 | to describe functions' calling conventions. | |
18840 | ||
18841 | However, because it's a necessary piece of information in | |
0c1b455e TT |
18842 | Fortran, and before DWARF 4 DW_CC_program was the only |
18843 | piece of debugging information whose definition refers to | |
18844 | a 'main program' at all, several compilers marked Fortran | |
18845 | main programs with DW_CC_program --- even when those | |
18846 | functions use the standard calling conventions. | |
18847 | ||
18848 | Although DWARF now specifies a way to provide this | |
18849 | information, we support this practice for backward | |
18850 | compatibility. */ | |
68511cec | 18851 | if (DW_UNSND (&attr) == DW_CC_program |
0c1b455e | 18852 | && cu->language == language_fortran) |
48fbe735 | 18853 | main_subprogram = 1; |
68511cec | 18854 | break; |
481860b3 GB |
18855 | case DW_AT_inline: |
18856 | if (DW_UNSND (&attr) == DW_INL_inlined | |
18857 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
48fbe735 | 18858 | may_be_inlined = 1; |
481860b3 | 18859 | break; |
95554aad TT |
18860 | |
18861 | case DW_AT_import: | |
48fbe735 | 18862 | if (tag == DW_TAG_imported_unit) |
36586728 | 18863 | { |
48fbe735 YQ |
18864 | d.sect_off = dwarf2_get_ref_die_offset (&attr); |
18865 | is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
36586728 TT |
18866 | || cu->per_cu->is_dwz); |
18867 | } | |
95554aad TT |
18868 | break; |
18869 | ||
0c1b455e | 18870 | case DW_AT_main_subprogram: |
48fbe735 | 18871 | main_subprogram = DW_UNSND (&attr); |
0c1b455e TT |
18872 | break; |
18873 | ||
05caa1d2 TT |
18874 | case DW_AT_ranges: |
18875 | { | |
18876 | /* It would be nice to reuse dwarf2_get_pc_bounds here, | |
18877 | but that requires a full DIE, so instead we just | |
18878 | reimplement it. */ | |
18879 | int need_ranges_base = tag != DW_TAG_compile_unit; | |
18880 | unsigned int ranges_offset = (DW_UNSND (&attr) | |
18881 | + (need_ranges_base | |
18882 | ? cu->ranges_base | |
18883 | : 0)); | |
18884 | ||
18885 | /* Value of the DW_AT_ranges attribute is the offset in the | |
18886 | .debug_ranges section. */ | |
18887 | if (dwarf2_ranges_read (ranges_offset, &lowpc, &highpc, cu, | |
18888 | nullptr)) | |
18889 | has_pc_info = 1; | |
18890 | } | |
18891 | break; | |
18892 | ||
c906108c SS |
18893 | default: |
18894 | break; | |
18895 | } | |
18896 | } | |
18897 | ||
10d06d82 TT |
18898 | /* For Ada, if both the name and the linkage name appear, we prefer |
18899 | the latter. This lets "catch exception" work better, regardless | |
18900 | of the order in which the name and linkage name were emitted. | |
18901 | Really, though, this is just a workaround for the fact that gdb | |
18902 | doesn't store both the name and the linkage name. */ | |
18903 | if (cu->language == language_ada && linkage_name != nullptr) | |
18904 | name = linkage_name; | |
18905 | ||
91da1414 | 18906 | if (high_pc_relative) |
48fbe735 | 18907 | highpc += lowpc; |
91da1414 | 18908 | |
9373cf26 JK |
18909 | if (has_low_pc_attr && has_high_pc_attr) |
18910 | { | |
18911 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
18912 | eliminate duplicate copies of functions and vtables and such. | |
18913 | The linker will arbitrarily choose one and discard the others. | |
18914 | The AT_*_pc values for such functions refer to local labels in | |
18915 | these sections. If the section from that file was discarded, the | |
18916 | labels are not in the output, so the relocs get a value of 0. | |
18917 | If this is a discarded function, mark the pc bounds as invalid, | |
18918 | so that GDB will ignore it. */ | |
48fbe735 | 18919 | if (lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) |
9373cf26 | 18920 | { |
48fbe735 | 18921 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
bb5ed363 | 18922 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 | 18923 | |
b98664d3 | 18924 | complaint (_("DW_AT_low_pc %s is zero " |
9d8780f0 | 18925 | "for DIE at %s [in module %s]"), |
48fbe735 YQ |
18926 | paddress (gdbarch, lowpc), |
18927 | sect_offset_str (sect_off), | |
9d8780f0 | 18928 | objfile_name (objfile)); |
9373cf26 JK |
18929 | } |
18930 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
48fbe735 | 18931 | else if (lowpc >= highpc) |
9373cf26 | 18932 | { |
48fbe735 | 18933 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
bb5ed363 | 18934 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 | 18935 | |
b98664d3 | 18936 | complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s " |
9d8780f0 | 18937 | "for DIE at %s [in module %s]"), |
48fbe735 YQ |
18938 | paddress (gdbarch, lowpc), |
18939 | paddress (gdbarch, highpc), | |
18940 | sect_offset_str (sect_off), | |
9c541725 | 18941 | objfile_name (objfile)); |
9373cf26 JK |
18942 | } |
18943 | else | |
48fbe735 | 18944 | has_pc_info = 1; |
9373cf26 | 18945 | } |
85cbf3d3 | 18946 | |
c906108c SS |
18947 | return info_ptr; |
18948 | } | |
18949 | ||
72bf9492 DJ |
18950 | /* Find a cached partial DIE at OFFSET in CU. */ |
18951 | ||
d590ff25 YQ |
18952 | struct partial_die_info * |
18953 | dwarf2_cu::find_partial_die (sect_offset sect_off) | |
72bf9492 DJ |
18954 | { |
18955 | struct partial_die_info *lookup_die = NULL; | |
6f06d47b | 18956 | struct partial_die_info part_die (sect_off); |
72bf9492 | 18957 | |
9a3c8263 | 18958 | lookup_die = ((struct partial_die_info *) |
d590ff25 | 18959 | htab_find_with_hash (partial_dies, &part_die, |
9c541725 | 18960 | to_underlying (sect_off))); |
72bf9492 | 18961 | |
72bf9492 DJ |
18962 | return lookup_die; |
18963 | } | |
18964 | ||
348e048f DE |
18965 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
18966 | except in the case of .debug_types DIEs which do not reference | |
18967 | outside their CU (they do however referencing other types via | |
55f1336d | 18968 | DW_FORM_ref_sig8). */ |
72bf9492 | 18969 | |
122cf0f2 | 18970 | static const struct cu_partial_die_info |
9c541725 | 18971 | find_partial_die (sect_offset sect_off, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 18972 | { |
518817b3 SM |
18973 | struct dwarf2_per_objfile *dwarf2_per_objfile |
18974 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 18975 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
5afb4e99 DJ |
18976 | struct dwarf2_per_cu_data *per_cu = NULL; |
18977 | struct partial_die_info *pd = NULL; | |
72bf9492 | 18978 | |
36586728 | 18979 | if (offset_in_dwz == cu->per_cu->is_dwz |
9c541725 | 18980 | && offset_in_cu_p (&cu->header, sect_off)) |
5afb4e99 | 18981 | { |
d590ff25 | 18982 | pd = cu->find_partial_die (sect_off); |
5afb4e99 | 18983 | if (pd != NULL) |
fb816e8b | 18984 | return { cu, pd }; |
0d99eb77 DE |
18985 | /* We missed recording what we needed. |
18986 | Load all dies and try again. */ | |
18987 | per_cu = cu->per_cu; | |
5afb4e99 | 18988 | } |
0d99eb77 DE |
18989 | else |
18990 | { | |
18991 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 18992 | if (cu->per_cu->is_debug_types) |
0d99eb77 | 18993 | { |
9d8780f0 SM |
18994 | error (_("Dwarf Error: Type Unit at offset %s contains" |
18995 | " external reference to offset %s [in module %s].\n"), | |
18996 | sect_offset_str (cu->header.sect_off), sect_offset_str (sect_off), | |
0d99eb77 DE |
18997 | bfd_get_filename (objfile->obfd)); |
18998 | } | |
9c541725 | 18999 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
ed2dc618 | 19000 | dwarf2_per_objfile); |
72bf9492 | 19001 | |
0d99eb77 DE |
19002 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
19003 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 19004 | |
0d99eb77 | 19005 | per_cu->cu->last_used = 0; |
d590ff25 | 19006 | pd = per_cu->cu->find_partial_die (sect_off); |
0d99eb77 | 19007 | } |
5afb4e99 | 19008 | |
dee91e82 DE |
19009 | /* If we didn't find it, and not all dies have been loaded, |
19010 | load them all and try again. */ | |
19011 | ||
5afb4e99 DJ |
19012 | if (pd == NULL && per_cu->load_all_dies == 0) |
19013 | { | |
5afb4e99 | 19014 | per_cu->load_all_dies = 1; |
fd820528 DE |
19015 | |
19016 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
19017 | THIS_CU->cu may already be in use. So we can't just free it and | |
19018 | replace its DIEs with the ones we read in. Instead, we leave those | |
19019 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
19020 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
19021 | set. */ | |
dee91e82 | 19022 | load_partial_comp_unit (per_cu); |
5afb4e99 | 19023 | |
d590ff25 | 19024 | pd = per_cu->cu->find_partial_die (sect_off); |
5afb4e99 DJ |
19025 | } |
19026 | ||
19027 | if (pd == NULL) | |
19028 | internal_error (__FILE__, __LINE__, | |
9d8780f0 | 19029 | _("could not find partial DIE %s " |
3e43a32a | 19030 | "in cache [from module %s]\n"), |
9d8780f0 | 19031 | sect_offset_str (sect_off), bfd_get_filename (objfile->obfd)); |
fb816e8b | 19032 | return { per_cu->cu, pd }; |
72bf9492 DJ |
19033 | } |
19034 | ||
abc72ce4 DE |
19035 | /* See if we can figure out if the class lives in a namespace. We do |
19036 | this by looking for a member function; its demangled name will | |
19037 | contain namespace info, if there is any. */ | |
19038 | ||
19039 | static void | |
19040 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
19041 | struct dwarf2_cu *cu) | |
19042 | { | |
19043 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
19044 | what template types look like, because the demangler | |
19045 | frequently doesn't give the same name as the debug info. We | |
19046 | could fix this by only using the demangled name to get the | |
19047 | prefix (but see comment in read_structure_type). */ | |
19048 | ||
19049 | struct partial_die_info *real_pdi; | |
19050 | struct partial_die_info *child_pdi; | |
19051 | ||
19052 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
19053 | we should not do this. We'll prepend the parent's fully qualified | |
19054 | name when we create the partial symbol. */ | |
19055 | ||
19056 | real_pdi = struct_pdi; | |
19057 | while (real_pdi->has_specification) | |
fb816e8b | 19058 | { |
122cf0f2 AB |
19059 | auto res = find_partial_die (real_pdi->spec_offset, |
19060 | real_pdi->spec_is_dwz, cu); | |
fb816e8b TV |
19061 | real_pdi = res.pdi; |
19062 | cu = res.cu; | |
19063 | } | |
abc72ce4 DE |
19064 | |
19065 | if (real_pdi->die_parent != NULL) | |
19066 | return; | |
19067 | ||
19068 | for (child_pdi = struct_pdi->die_child; | |
19069 | child_pdi != NULL; | |
19070 | child_pdi = child_pdi->die_sibling) | |
19071 | { | |
19072 | if (child_pdi->tag == DW_TAG_subprogram | |
19073 | && child_pdi->linkage_name != NULL) | |
19074 | { | |
19075 | char *actual_class_name | |
19076 | = language_class_name_from_physname (cu->language_defn, | |
19077 | child_pdi->linkage_name); | |
19078 | if (actual_class_name != NULL) | |
19079 | { | |
518817b3 | 19080 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
abc72ce4 | 19081 | struct_pdi->name |
021887d8 TT |
19082 | = obstack_strdup (&objfile->per_bfd->storage_obstack, |
19083 | actual_class_name); | |
abc72ce4 DE |
19084 | xfree (actual_class_name); |
19085 | } | |
19086 | break; | |
19087 | } | |
19088 | } | |
19089 | } | |
19090 | ||
52356b79 YQ |
19091 | void |
19092 | partial_die_info::fixup (struct dwarf2_cu *cu) | |
72bf9492 | 19093 | { |
abc72ce4 DE |
19094 | /* Once we've fixed up a die, there's no point in doing so again. |
19095 | This also avoids a memory leak if we were to call | |
19096 | guess_partial_die_structure_name multiple times. */ | |
52356b79 | 19097 | if (fixup_called) |
abc72ce4 DE |
19098 | return; |
19099 | ||
72bf9492 DJ |
19100 | /* If we found a reference attribute and the DIE has no name, try |
19101 | to find a name in the referred to DIE. */ | |
19102 | ||
52356b79 | 19103 | if (name == NULL && has_specification) |
72bf9492 DJ |
19104 | { |
19105 | struct partial_die_info *spec_die; | |
72bf9492 | 19106 | |
122cf0f2 | 19107 | auto res = find_partial_die (spec_offset, spec_is_dwz, cu); |
fb816e8b TV |
19108 | spec_die = res.pdi; |
19109 | cu = res.cu; | |
72bf9492 | 19110 | |
52356b79 | 19111 | spec_die->fixup (cu); |
72bf9492 DJ |
19112 | |
19113 | if (spec_die->name) | |
19114 | { | |
52356b79 | 19115 | name = spec_die->name; |
72bf9492 DJ |
19116 | |
19117 | /* Copy DW_AT_external attribute if it is set. */ | |
19118 | if (spec_die->is_external) | |
52356b79 | 19119 | is_external = spec_die->is_external; |
72bf9492 DJ |
19120 | } |
19121 | } | |
19122 | ||
19123 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 | 19124 | |
52356b79 YQ |
19125 | if (name == NULL && tag == DW_TAG_namespace) |
19126 | name = CP_ANONYMOUS_NAMESPACE_STR; | |
72bf9492 | 19127 | |
abc72ce4 DE |
19128 | /* If there is no parent die to provide a namespace, and there are |
19129 | children, see if we can determine the namespace from their linkage | |
122d1940 | 19130 | name. */ |
abc72ce4 | 19131 | if (cu->language == language_cplus |
fd5866f6 | 19132 | && !cu->per_cu->dwarf2_per_objfile->types.empty () |
52356b79 YQ |
19133 | && die_parent == NULL |
19134 | && has_children | |
19135 | && (tag == DW_TAG_class_type | |
19136 | || tag == DW_TAG_structure_type | |
19137 | || tag == DW_TAG_union_type)) | |
19138 | guess_partial_die_structure_name (this, cu); | |
abc72ce4 | 19139 | |
53832f31 TT |
19140 | /* GCC might emit a nameless struct or union that has a linkage |
19141 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
52356b79 YQ |
19142 | if (name == NULL |
19143 | && (tag == DW_TAG_class_type | |
19144 | || tag == DW_TAG_interface_type | |
19145 | || tag == DW_TAG_structure_type | |
19146 | || tag == DW_TAG_union_type) | |
19147 | && linkage_name != NULL) | |
53832f31 TT |
19148 | { |
19149 | char *demangled; | |
19150 | ||
52356b79 | 19151 | demangled = gdb_demangle (linkage_name, DMGL_TYPES); |
53832f31 TT |
19152 | if (demangled) |
19153 | { | |
96408a79 SA |
19154 | const char *base; |
19155 | ||
19156 | /* Strip any leading namespaces/classes, keep only the base name. | |
19157 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
19158 | base = strrchr (demangled, ':'); | |
19159 | if (base && base > demangled && base[-1] == ':') | |
19160 | base++; | |
19161 | else | |
19162 | base = demangled; | |
19163 | ||
518817b3 | 19164 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
021887d8 | 19165 | name = obstack_strdup (&objfile->per_bfd->storage_obstack, base); |
53832f31 TT |
19166 | xfree (demangled); |
19167 | } | |
19168 | } | |
19169 | ||
52356b79 | 19170 | fixup_called = 1; |
72bf9492 DJ |
19171 | } |
19172 | ||
a8329558 | 19173 | /* Read an attribute value described by an attribute form. */ |
c906108c | 19174 | |
d521ce57 | 19175 | static const gdb_byte * |
dee91e82 DE |
19176 | read_attribute_value (const struct die_reader_specs *reader, |
19177 | struct attribute *attr, unsigned form, | |
43988095 | 19178 | LONGEST implicit_const, const gdb_byte *info_ptr) |
c906108c | 19179 | { |
dee91e82 | 19180 | struct dwarf2_cu *cu = reader->cu; |
518817b3 SM |
19181 | struct dwarf2_per_objfile *dwarf2_per_objfile |
19182 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 19183 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 19184 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
dee91e82 | 19185 | bfd *abfd = reader->abfd; |
e7c27a73 | 19186 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
19187 | unsigned int bytes_read; |
19188 | struct dwarf_block *blk; | |
19189 | ||
aead7601 | 19190 | attr->form = (enum dwarf_form) form; |
a8329558 | 19191 | switch (form) |
c906108c | 19192 | { |
c906108c | 19193 | case DW_FORM_ref_addr: |
ae411497 | 19194 | if (cu->header.version == 2) |
4568ecf9 | 19195 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 19196 | else |
4568ecf9 DE |
19197 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
19198 | &cu->header, &bytes_read); | |
ae411497 TT |
19199 | info_ptr += bytes_read; |
19200 | break; | |
36586728 TT |
19201 | case DW_FORM_GNU_ref_alt: |
19202 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
19203 | info_ptr += bytes_read; | |
19204 | break; | |
ae411497 | 19205 | case DW_FORM_addr: |
e7c27a73 | 19206 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
3e29f34a | 19207 | DW_ADDR (attr) = gdbarch_adjust_dwarf2_addr (gdbarch, DW_ADDR (attr)); |
107d2387 | 19208 | info_ptr += bytes_read; |
c906108c SS |
19209 | break; |
19210 | case DW_FORM_block2: | |
7b5a2f43 | 19211 | blk = dwarf_alloc_block (cu); |
c906108c SS |
19212 | blk->size = read_2_bytes (abfd, info_ptr); |
19213 | info_ptr += 2; | |
19214 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
19215 | info_ptr += blk->size; | |
19216 | DW_BLOCK (attr) = blk; | |
19217 | break; | |
19218 | case DW_FORM_block4: | |
7b5a2f43 | 19219 | blk = dwarf_alloc_block (cu); |
c906108c SS |
19220 | blk->size = read_4_bytes (abfd, info_ptr); |
19221 | info_ptr += 4; | |
19222 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
19223 | info_ptr += blk->size; | |
19224 | DW_BLOCK (attr) = blk; | |
19225 | break; | |
19226 | case DW_FORM_data2: | |
19227 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
19228 | info_ptr += 2; | |
19229 | break; | |
19230 | case DW_FORM_data4: | |
19231 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
19232 | info_ptr += 4; | |
19233 | break; | |
19234 | case DW_FORM_data8: | |
19235 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
19236 | info_ptr += 8; | |
19237 | break; | |
0224619f JK |
19238 | case DW_FORM_data16: |
19239 | blk = dwarf_alloc_block (cu); | |
19240 | blk->size = 16; | |
19241 | blk->data = read_n_bytes (abfd, info_ptr, 16); | |
19242 | info_ptr += 16; | |
19243 | DW_BLOCK (attr) = blk; | |
19244 | break; | |
2dc7f7b3 TT |
19245 | case DW_FORM_sec_offset: |
19246 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
19247 | info_ptr += bytes_read; | |
19248 | break; | |
c906108c | 19249 | case DW_FORM_string: |
9b1c24c8 | 19250 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 19251 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
19252 | info_ptr += bytes_read; |
19253 | break; | |
4bdf3d34 | 19254 | case DW_FORM_strp: |
36586728 TT |
19255 | if (!cu->per_cu->is_dwz) |
19256 | { | |
ed2dc618 SM |
19257 | DW_STRING (attr) = read_indirect_string (dwarf2_per_objfile, |
19258 | abfd, info_ptr, cu_header, | |
36586728 TT |
19259 | &bytes_read); |
19260 | DW_STRING_IS_CANONICAL (attr) = 0; | |
19261 | info_ptr += bytes_read; | |
19262 | break; | |
19263 | } | |
19264 | /* FALLTHROUGH */ | |
43988095 JK |
19265 | case DW_FORM_line_strp: |
19266 | if (!cu->per_cu->is_dwz) | |
19267 | { | |
ed2dc618 SM |
19268 | DW_STRING (attr) = read_indirect_line_string (dwarf2_per_objfile, |
19269 | abfd, info_ptr, | |
43988095 JK |
19270 | cu_header, &bytes_read); |
19271 | DW_STRING_IS_CANONICAL (attr) = 0; | |
19272 | info_ptr += bytes_read; | |
19273 | break; | |
19274 | } | |
19275 | /* FALLTHROUGH */ | |
36586728 TT |
19276 | case DW_FORM_GNU_strp_alt: |
19277 | { | |
ed2dc618 | 19278 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
36586728 TT |
19279 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, |
19280 | &bytes_read); | |
19281 | ||
ed2dc618 SM |
19282 | DW_STRING (attr) = read_indirect_string_from_dwz (objfile, |
19283 | dwz, str_offset); | |
36586728 TT |
19284 | DW_STRING_IS_CANONICAL (attr) = 0; |
19285 | info_ptr += bytes_read; | |
19286 | } | |
4bdf3d34 | 19287 | break; |
2dc7f7b3 | 19288 | case DW_FORM_exprloc: |
c906108c | 19289 | case DW_FORM_block: |
7b5a2f43 | 19290 | blk = dwarf_alloc_block (cu); |
c906108c SS |
19291 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
19292 | info_ptr += bytes_read; | |
19293 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
19294 | info_ptr += blk->size; | |
19295 | DW_BLOCK (attr) = blk; | |
19296 | break; | |
19297 | case DW_FORM_block1: | |
7b5a2f43 | 19298 | blk = dwarf_alloc_block (cu); |
c906108c SS |
19299 | blk->size = read_1_byte (abfd, info_ptr); |
19300 | info_ptr += 1; | |
19301 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
19302 | info_ptr += blk->size; | |
19303 | DW_BLOCK (attr) = blk; | |
19304 | break; | |
19305 | case DW_FORM_data1: | |
19306 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
19307 | info_ptr += 1; | |
19308 | break; | |
19309 | case DW_FORM_flag: | |
19310 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
19311 | info_ptr += 1; | |
19312 | break; | |
2dc7f7b3 TT |
19313 | case DW_FORM_flag_present: |
19314 | DW_UNSND (attr) = 1; | |
19315 | break; | |
c906108c SS |
19316 | case DW_FORM_sdata: |
19317 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
19318 | info_ptr += bytes_read; | |
19319 | break; | |
19320 | case DW_FORM_udata: | |
19321 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
19322 | info_ptr += bytes_read; | |
19323 | break; | |
19324 | case DW_FORM_ref1: | |
9c541725 | 19325 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19326 | + read_1_byte (abfd, info_ptr)); |
c906108c SS |
19327 | info_ptr += 1; |
19328 | break; | |
19329 | case DW_FORM_ref2: | |
9c541725 | 19330 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19331 | + read_2_bytes (abfd, info_ptr)); |
c906108c SS |
19332 | info_ptr += 2; |
19333 | break; | |
19334 | case DW_FORM_ref4: | |
9c541725 | 19335 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19336 | + read_4_bytes (abfd, info_ptr)); |
c906108c SS |
19337 | info_ptr += 4; |
19338 | break; | |
613e1657 | 19339 | case DW_FORM_ref8: |
9c541725 | 19340 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19341 | + read_8_bytes (abfd, info_ptr)); |
613e1657 KB |
19342 | info_ptr += 8; |
19343 | break; | |
55f1336d | 19344 | case DW_FORM_ref_sig8: |
ac9ec31b | 19345 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
19346 | info_ptr += 8; |
19347 | break; | |
c906108c | 19348 | case DW_FORM_ref_udata: |
9c541725 | 19349 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19350 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); |
c906108c SS |
19351 | info_ptr += bytes_read; |
19352 | break; | |
c906108c | 19353 | case DW_FORM_indirect: |
a8329558 KW |
19354 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
19355 | info_ptr += bytes_read; | |
43988095 JK |
19356 | if (form == DW_FORM_implicit_const) |
19357 | { | |
19358 | implicit_const = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
19359 | info_ptr += bytes_read; | |
19360 | } | |
19361 | info_ptr = read_attribute_value (reader, attr, form, implicit_const, | |
19362 | info_ptr); | |
19363 | break; | |
19364 | case DW_FORM_implicit_const: | |
19365 | DW_SND (attr) = implicit_const; | |
a8329558 | 19366 | break; |
336d760d | 19367 | case DW_FORM_addrx: |
3019eac3 DE |
19368 | case DW_FORM_GNU_addr_index: |
19369 | if (reader->dwo_file == NULL) | |
19370 | { | |
19371 | /* For now flag a hard error. | |
19372 | Later we can turn this into a complaint. */ | |
19373 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
19374 | dwarf_form_name (form), | |
19375 | bfd_get_filename (abfd)); | |
19376 | } | |
19377 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
19378 | info_ptr += bytes_read; | |
19379 | break; | |
cf532bd1 | 19380 | case DW_FORM_strx: |
15f18d14 AT |
19381 | case DW_FORM_strx1: |
19382 | case DW_FORM_strx2: | |
19383 | case DW_FORM_strx3: | |
19384 | case DW_FORM_strx4: | |
3019eac3 DE |
19385 | case DW_FORM_GNU_str_index: |
19386 | if (reader->dwo_file == NULL) | |
19387 | { | |
19388 | /* For now flag a hard error. | |
19389 | Later we can turn this into a complaint if warranted. */ | |
19390 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
19391 | dwarf_form_name (form), | |
19392 | bfd_get_filename (abfd)); | |
19393 | } | |
19394 | { | |
15f18d14 AT |
19395 | ULONGEST str_index; |
19396 | if (form == DW_FORM_strx1) | |
19397 | { | |
19398 | str_index = read_1_byte (abfd, info_ptr); | |
19399 | info_ptr += 1; | |
19400 | } | |
19401 | else if (form == DW_FORM_strx2) | |
19402 | { | |
19403 | str_index = read_2_bytes (abfd, info_ptr); | |
19404 | info_ptr += 2; | |
19405 | } | |
19406 | else if (form == DW_FORM_strx3) | |
19407 | { | |
19408 | str_index = read_3_bytes (abfd, info_ptr); | |
19409 | info_ptr += 3; | |
19410 | } | |
19411 | else if (form == DW_FORM_strx4) | |
19412 | { | |
19413 | str_index = read_4_bytes (abfd, info_ptr); | |
19414 | info_ptr += 4; | |
19415 | } | |
19416 | else | |
19417 | { | |
19418 | str_index = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
19419 | info_ptr += bytes_read; | |
19420 | } | |
342587c4 | 19421 | DW_STRING (attr) = read_str_index (reader, str_index); |
3019eac3 | 19422 | DW_STRING_IS_CANONICAL (attr) = 0; |
3019eac3 DE |
19423 | } |
19424 | break; | |
c906108c | 19425 | default: |
8a3fe4f8 | 19426 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
19427 | dwarf_form_name (form), |
19428 | bfd_get_filename (abfd)); | |
c906108c | 19429 | } |
28e94949 | 19430 | |
36586728 | 19431 | /* Super hack. */ |
7771576e | 19432 | if (cu->per_cu->is_dwz && attr_form_is_ref (attr)) |
36586728 TT |
19433 | attr->form = DW_FORM_GNU_ref_alt; |
19434 | ||
28e94949 JB |
19435 | /* We have seen instances where the compiler tried to emit a byte |
19436 | size attribute of -1 which ended up being encoded as an unsigned | |
19437 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
19438 | an object of this size seems pretty unlikely so we can relatively | |
19439 | safely treat these cases as if the size attribute was invalid and | |
19440 | treat them as zero by default. */ | |
19441 | if (attr->name == DW_AT_byte_size | |
19442 | && form == DW_FORM_data4 | |
19443 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
19444 | { |
19445 | complaint | |
b98664d3 | 19446 | (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
43bbcdc2 | 19447 | hex_string (DW_UNSND (attr))); |
01c66ae6 JB |
19448 | DW_UNSND (attr) = 0; |
19449 | } | |
28e94949 | 19450 | |
c906108c SS |
19451 | return info_ptr; |
19452 | } | |
19453 | ||
a8329558 KW |
19454 | /* Read an attribute described by an abbreviated attribute. */ |
19455 | ||
d521ce57 | 19456 | static const gdb_byte * |
dee91e82 DE |
19457 | read_attribute (const struct die_reader_specs *reader, |
19458 | struct attribute *attr, struct attr_abbrev *abbrev, | |
d521ce57 | 19459 | const gdb_byte *info_ptr) |
a8329558 KW |
19460 | { |
19461 | attr->name = abbrev->name; | |
43988095 JK |
19462 | return read_attribute_value (reader, attr, abbrev->form, |
19463 | abbrev->implicit_const, info_ptr); | |
a8329558 KW |
19464 | } |
19465 | ||
0963b4bd | 19466 | /* Read dwarf information from a buffer. */ |
c906108c SS |
19467 | |
19468 | static unsigned int | |
a1855c1d | 19469 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 19470 | { |
fe1b8b76 | 19471 | return bfd_get_8 (abfd, buf); |
c906108c SS |
19472 | } |
19473 | ||
19474 | static int | |
a1855c1d | 19475 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 19476 | { |
fe1b8b76 | 19477 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
19478 | } |
19479 | ||
19480 | static unsigned int | |
a1855c1d | 19481 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 19482 | { |
fe1b8b76 | 19483 | return bfd_get_16 (abfd, buf); |
c906108c SS |
19484 | } |
19485 | ||
21ae7a4d | 19486 | static int |
a1855c1d | 19487 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
19488 | { |
19489 | return bfd_get_signed_16 (abfd, buf); | |
19490 | } | |
19491 | ||
15f18d14 AT |
19492 | static unsigned int |
19493 | read_3_bytes (bfd *abfd, const gdb_byte *buf) | |
19494 | { | |
19495 | unsigned int result = 0; | |
19496 | for (int i = 0; i < 3; ++i) | |
19497 | { | |
19498 | unsigned char byte = bfd_get_8 (abfd, buf); | |
19499 | buf++; | |
19500 | result |= ((unsigned int) byte << (i * 8)); | |
19501 | } | |
19502 | return result; | |
19503 | } | |
19504 | ||
c906108c | 19505 | static unsigned int |
a1855c1d | 19506 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 19507 | { |
fe1b8b76 | 19508 | return bfd_get_32 (abfd, buf); |
c906108c SS |
19509 | } |
19510 | ||
21ae7a4d | 19511 | static int |
a1855c1d | 19512 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
19513 | { |
19514 | return bfd_get_signed_32 (abfd, buf); | |
19515 | } | |
19516 | ||
93311388 | 19517 | static ULONGEST |
a1855c1d | 19518 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 19519 | { |
fe1b8b76 | 19520 | return bfd_get_64 (abfd, buf); |
c906108c SS |
19521 | } |
19522 | ||
19523 | static CORE_ADDR | |
d521ce57 | 19524 | read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 19525 | unsigned int *bytes_read) |
c906108c | 19526 | { |
e7c27a73 | 19527 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
19528 | CORE_ADDR retval = 0; |
19529 | ||
107d2387 | 19530 | if (cu_header->signed_addr_p) |
c906108c | 19531 | { |
107d2387 AC |
19532 | switch (cu_header->addr_size) |
19533 | { | |
19534 | case 2: | |
fe1b8b76 | 19535 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
19536 | break; |
19537 | case 4: | |
fe1b8b76 | 19538 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
19539 | break; |
19540 | case 8: | |
fe1b8b76 | 19541 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
19542 | break; |
19543 | default: | |
8e65ff28 | 19544 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 19545 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 19546 | bfd_get_filename (abfd)); |
107d2387 AC |
19547 | } |
19548 | } | |
19549 | else | |
19550 | { | |
19551 | switch (cu_header->addr_size) | |
19552 | { | |
19553 | case 2: | |
fe1b8b76 | 19554 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
19555 | break; |
19556 | case 4: | |
fe1b8b76 | 19557 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
19558 | break; |
19559 | case 8: | |
fe1b8b76 | 19560 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
19561 | break; |
19562 | default: | |
8e65ff28 | 19563 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
19564 | _("read_address: bad switch, " |
19565 | "unsigned [in module %s]"), | |
659b0389 | 19566 | bfd_get_filename (abfd)); |
107d2387 | 19567 | } |
c906108c | 19568 | } |
64367e0a | 19569 | |
107d2387 AC |
19570 | *bytes_read = cu_header->addr_size; |
19571 | return retval; | |
c906108c SS |
19572 | } |
19573 | ||
f7ef9339 | 19574 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
19575 | specification allows the initial length to take up either 4 bytes |
19576 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
19577 | bytes describe the length and all offsets will be 8 bytes in length | |
19578 | instead of 4. | |
19579 | ||
f7ef9339 KB |
19580 | An older, non-standard 64-bit format is also handled by this |
19581 | function. The older format in question stores the initial length | |
19582 | as an 8-byte quantity without an escape value. Lengths greater | |
19583 | than 2^32 aren't very common which means that the initial 4 bytes | |
19584 | is almost always zero. Since a length value of zero doesn't make | |
19585 | sense for the 32-bit format, this initial zero can be considered to | |
19586 | be an escape value which indicates the presence of the older 64-bit | |
19587 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
19588 | greater than 4GB. If it becomes necessary to handle lengths |
19589 | somewhat larger than 4GB, we could allow other small values (such | |
19590 | as the non-sensical values of 1, 2, and 3) to also be used as | |
19591 | escape values indicating the presence of the old format. | |
f7ef9339 | 19592 | |
917c78fc MK |
19593 | The value returned via bytes_read should be used to increment the |
19594 | relevant pointer after calling read_initial_length(). | |
c764a876 | 19595 | |
613e1657 KB |
19596 | [ Note: read_initial_length() and read_offset() are based on the |
19597 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 19598 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
19599 | from: |
19600 | ||
f7ef9339 | 19601 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 19602 | |
613e1657 KB |
19603 | This document is only a draft and is subject to change. (So beware.) |
19604 | ||
f7ef9339 | 19605 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
19606 | determined empirically by examining 64-bit ELF files produced by |
19607 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
19608 | |
19609 | - Kevin, July 16, 2002 | |
613e1657 KB |
19610 | ] */ |
19611 | ||
19612 | static LONGEST | |
d521ce57 | 19613 | read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 19614 | { |
fe1b8b76 | 19615 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 19616 | |
dd373385 | 19617 | if (length == 0xffffffff) |
613e1657 | 19618 | { |
fe1b8b76 | 19619 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 19620 | *bytes_read = 12; |
613e1657 | 19621 | } |
dd373385 | 19622 | else if (length == 0) |
f7ef9339 | 19623 | { |
dd373385 | 19624 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 19625 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 19626 | *bytes_read = 8; |
f7ef9339 | 19627 | } |
613e1657 KB |
19628 | else |
19629 | { | |
19630 | *bytes_read = 4; | |
613e1657 KB |
19631 | } |
19632 | ||
c764a876 DE |
19633 | return length; |
19634 | } | |
dd373385 | 19635 | |
c764a876 DE |
19636 | /* Cover function for read_initial_length. |
19637 | Returns the length of the object at BUF, and stores the size of the | |
19638 | initial length in *BYTES_READ and stores the size that offsets will be in | |
19639 | *OFFSET_SIZE. | |
19640 | If the initial length size is not equivalent to that specified in | |
19641 | CU_HEADER then issue a complaint. | |
19642 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 19643 | |
c764a876 | 19644 | static LONGEST |
d521ce57 | 19645 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
19646 | const struct comp_unit_head *cu_header, |
19647 | unsigned int *bytes_read, | |
19648 | unsigned int *offset_size) | |
19649 | { | |
19650 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
19651 | ||
19652 | gdb_assert (cu_header->initial_length_size == 4 | |
19653 | || cu_header->initial_length_size == 8 | |
19654 | || cu_header->initial_length_size == 12); | |
19655 | ||
19656 | if (cu_header->initial_length_size != *bytes_read) | |
b98664d3 | 19657 | complaint (_("intermixed 32-bit and 64-bit DWARF sections")); |
dd373385 | 19658 | |
c764a876 | 19659 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 19660 | return length; |
613e1657 KB |
19661 | } |
19662 | ||
19663 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 19664 | given by cu_header->offset_size. */ |
613e1657 KB |
19665 | |
19666 | static LONGEST | |
d521ce57 TT |
19667 | read_offset (bfd *abfd, const gdb_byte *buf, |
19668 | const struct comp_unit_head *cu_header, | |
891d2f0b | 19669 | unsigned int *bytes_read) |
c764a876 DE |
19670 | { |
19671 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 19672 | |
c764a876 DE |
19673 | *bytes_read = cu_header->offset_size; |
19674 | return offset; | |
19675 | } | |
19676 | ||
19677 | /* Read an offset from the data stream. */ | |
19678 | ||
19679 | static LONGEST | |
d521ce57 | 19680 | read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size) |
613e1657 KB |
19681 | { |
19682 | LONGEST retval = 0; | |
19683 | ||
c764a876 | 19684 | switch (offset_size) |
613e1657 KB |
19685 | { |
19686 | case 4: | |
fe1b8b76 | 19687 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
19688 | break; |
19689 | case 8: | |
fe1b8b76 | 19690 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
19691 | break; |
19692 | default: | |
8e65ff28 | 19693 | internal_error (__FILE__, __LINE__, |
c764a876 | 19694 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 19695 | bfd_get_filename (abfd)); |
613e1657 KB |
19696 | } |
19697 | ||
917c78fc | 19698 | return retval; |
613e1657 KB |
19699 | } |
19700 | ||
d521ce57 TT |
19701 | static const gdb_byte * |
19702 | read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size) | |
c906108c SS |
19703 | { |
19704 | /* If the size of a host char is 8 bits, we can return a pointer | |
19705 | to the buffer, otherwise we have to copy the data to a buffer | |
19706 | allocated on the temporary obstack. */ | |
4bdf3d34 | 19707 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 19708 | return buf; |
c906108c SS |
19709 | } |
19710 | ||
d521ce57 TT |
19711 | static const char * |
19712 | read_direct_string (bfd *abfd, const gdb_byte *buf, | |
19713 | unsigned int *bytes_read_ptr) | |
c906108c SS |
19714 | { |
19715 | /* If the size of a host char is 8 bits, we can return a pointer | |
19716 | to the string, otherwise we have to copy the string to a buffer | |
19717 | allocated on the temporary obstack. */ | |
4bdf3d34 | 19718 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
19719 | if (*buf == '\0') |
19720 | { | |
19721 | *bytes_read_ptr = 1; | |
19722 | return NULL; | |
19723 | } | |
d521ce57 TT |
19724 | *bytes_read_ptr = strlen ((const char *) buf) + 1; |
19725 | return (const char *) buf; | |
4bdf3d34 JJ |
19726 | } |
19727 | ||
43988095 JK |
19728 | /* Return pointer to string at section SECT offset STR_OFFSET with error |
19729 | reporting strings FORM_NAME and SECT_NAME. */ | |
19730 | ||
d521ce57 | 19731 | static const char * |
ed2dc618 SM |
19732 | read_indirect_string_at_offset_from (struct objfile *objfile, |
19733 | bfd *abfd, LONGEST str_offset, | |
43988095 JK |
19734 | struct dwarf2_section_info *sect, |
19735 | const char *form_name, | |
19736 | const char *sect_name) | |
19737 | { | |
ed2dc618 | 19738 | dwarf2_read_section (objfile, sect); |
43988095 JK |
19739 | if (sect->buffer == NULL) |
19740 | error (_("%s used without %s section [in module %s]"), | |
19741 | form_name, sect_name, bfd_get_filename (abfd)); | |
19742 | if (str_offset >= sect->size) | |
19743 | error (_("%s pointing outside of %s section [in module %s]"), | |
19744 | form_name, sect_name, bfd_get_filename (abfd)); | |
4bdf3d34 | 19745 | gdb_assert (HOST_CHAR_BIT == 8); |
43988095 | 19746 | if (sect->buffer[str_offset] == '\0') |
4bdf3d34 | 19747 | return NULL; |
43988095 JK |
19748 | return (const char *) (sect->buffer + str_offset); |
19749 | } | |
19750 | ||
19751 | /* Return pointer to string at .debug_str offset STR_OFFSET. */ | |
19752 | ||
19753 | static const char * | |
ed2dc618 SM |
19754 | read_indirect_string_at_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
19755 | bfd *abfd, LONGEST str_offset) | |
43988095 | 19756 | { |
ed2dc618 SM |
19757 | return read_indirect_string_at_offset_from (dwarf2_per_objfile->objfile, |
19758 | abfd, str_offset, | |
43988095 JK |
19759 | &dwarf2_per_objfile->str, |
19760 | "DW_FORM_strp", ".debug_str"); | |
19761 | } | |
19762 | ||
19763 | /* Return pointer to string at .debug_line_str offset STR_OFFSET. */ | |
19764 | ||
19765 | static const char * | |
ed2dc618 SM |
19766 | read_indirect_line_string_at_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
19767 | bfd *abfd, LONGEST str_offset) | |
43988095 | 19768 | { |
ed2dc618 SM |
19769 | return read_indirect_string_at_offset_from (dwarf2_per_objfile->objfile, |
19770 | abfd, str_offset, | |
43988095 JK |
19771 | &dwarf2_per_objfile->line_str, |
19772 | "DW_FORM_line_strp", | |
19773 | ".debug_line_str"); | |
c906108c SS |
19774 | } |
19775 | ||
36586728 TT |
19776 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
19777 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
19778 | the string consists of a single NUL byte, return NULL; otherwise | |
19779 | return a pointer to the string. */ | |
19780 | ||
d521ce57 | 19781 | static const char * |
ed2dc618 SM |
19782 | read_indirect_string_from_dwz (struct objfile *objfile, struct dwz_file *dwz, |
19783 | LONGEST str_offset) | |
36586728 | 19784 | { |
ed2dc618 | 19785 | dwarf2_read_section (objfile, &dwz->str); |
36586728 TT |
19786 | |
19787 | if (dwz->str.buffer == NULL) | |
19788 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
19789 | "section [in module %s]"), | |
00f93c44 | 19790 | bfd_get_filename (dwz->dwz_bfd.get ())); |
36586728 TT |
19791 | if (str_offset >= dwz->str.size) |
19792 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
19793 | ".debug_str section [in module %s]"), | |
00f93c44 | 19794 | bfd_get_filename (dwz->dwz_bfd.get ())); |
36586728 TT |
19795 | gdb_assert (HOST_CHAR_BIT == 8); |
19796 | if (dwz->str.buffer[str_offset] == '\0') | |
19797 | return NULL; | |
d521ce57 | 19798 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
19799 | } |
19800 | ||
43988095 JK |
19801 | /* Return pointer to string at .debug_str offset as read from BUF. |
19802 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
19803 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
19804 | ||
d521ce57 | 19805 | static const char * |
ed2dc618 SM |
19806 | read_indirect_string (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *abfd, |
19807 | const gdb_byte *buf, | |
cf2c3c16 TT |
19808 | const struct comp_unit_head *cu_header, |
19809 | unsigned int *bytes_read_ptr) | |
19810 | { | |
19811 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
19812 | ||
ed2dc618 | 19813 | return read_indirect_string_at_offset (dwarf2_per_objfile, abfd, str_offset); |
cf2c3c16 TT |
19814 | } |
19815 | ||
43988095 JK |
19816 | /* Return pointer to string at .debug_line_str offset as read from BUF. |
19817 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
19818 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
19819 | ||
19820 | static const char * | |
ed2dc618 SM |
19821 | read_indirect_line_string (struct dwarf2_per_objfile *dwarf2_per_objfile, |
19822 | bfd *abfd, const gdb_byte *buf, | |
43988095 JK |
19823 | const struct comp_unit_head *cu_header, |
19824 | unsigned int *bytes_read_ptr) | |
19825 | { | |
19826 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
19827 | ||
ed2dc618 SM |
19828 | return read_indirect_line_string_at_offset (dwarf2_per_objfile, abfd, |
19829 | str_offset); | |
43988095 JK |
19830 | } |
19831 | ||
19832 | ULONGEST | |
d521ce57 | 19833 | read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf, |
43988095 | 19834 | unsigned int *bytes_read_ptr) |
c906108c | 19835 | { |
12df843f | 19836 | ULONGEST result; |
ce5d95e1 | 19837 | unsigned int num_read; |
870f88f7 | 19838 | int shift; |
c906108c SS |
19839 | unsigned char byte; |
19840 | ||
19841 | result = 0; | |
19842 | shift = 0; | |
19843 | num_read = 0; | |
c906108c SS |
19844 | while (1) |
19845 | { | |
fe1b8b76 | 19846 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
19847 | buf++; |
19848 | num_read++; | |
12df843f | 19849 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
19850 | if ((byte & 128) == 0) |
19851 | { | |
19852 | break; | |
19853 | } | |
19854 | shift += 7; | |
19855 | } | |
19856 | *bytes_read_ptr = num_read; | |
19857 | return result; | |
19858 | } | |
19859 | ||
12df843f | 19860 | static LONGEST |
d521ce57 TT |
19861 | read_signed_leb128 (bfd *abfd, const gdb_byte *buf, |
19862 | unsigned int *bytes_read_ptr) | |
c906108c | 19863 | { |
4dd1b460 | 19864 | ULONGEST result; |
870f88f7 | 19865 | int shift, num_read; |
c906108c SS |
19866 | unsigned char byte; |
19867 | ||
19868 | result = 0; | |
19869 | shift = 0; | |
c906108c | 19870 | num_read = 0; |
c906108c SS |
19871 | while (1) |
19872 | { | |
fe1b8b76 | 19873 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
19874 | buf++; |
19875 | num_read++; | |
4dd1b460 | 19876 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
19877 | shift += 7; |
19878 | if ((byte & 128) == 0) | |
19879 | { | |
19880 | break; | |
19881 | } | |
19882 | } | |
77e0b926 | 19883 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
4dd1b460 | 19884 | result |= -(((ULONGEST) 1) << shift); |
c906108c SS |
19885 | *bytes_read_ptr = num_read; |
19886 | return result; | |
19887 | } | |
19888 | ||
3019eac3 DE |
19889 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
19890 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
19891 | ADDR_SIZE is the size of addresses from the CU header. */ | |
19892 | ||
19893 | static CORE_ADDR | |
ed2dc618 SM |
19894 | read_addr_index_1 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
19895 | unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
3019eac3 DE |
19896 | { |
19897 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
19898 | bfd *abfd = objfile->obfd; | |
19899 | const gdb_byte *info_ptr; | |
19900 | ||
19901 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
19902 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
19903 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 19904 | objfile_name (objfile)); |
3019eac3 DE |
19905 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) |
19906 | error (_("DW_FORM_addr_index pointing outside of " | |
19907 | ".debug_addr section [in module %s]"), | |
4262abfb | 19908 | objfile_name (objfile)); |
3019eac3 DE |
19909 | info_ptr = (dwarf2_per_objfile->addr.buffer |
19910 | + addr_base + addr_index * addr_size); | |
19911 | if (addr_size == 4) | |
19912 | return bfd_get_32 (abfd, info_ptr); | |
19913 | else | |
19914 | return bfd_get_64 (abfd, info_ptr); | |
19915 | } | |
19916 | ||
19917 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
19918 | ||
19919 | static CORE_ADDR | |
19920 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
19921 | { | |
518817b3 SM |
19922 | return read_addr_index_1 (cu->per_cu->dwarf2_per_objfile, addr_index, |
19923 | cu->addr_base, cu->header.addr_size); | |
3019eac3 DE |
19924 | } |
19925 | ||
19926 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
19927 | ||
19928 | static CORE_ADDR | |
d521ce57 | 19929 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
19930 | unsigned int *bytes_read) |
19931 | { | |
518817b3 | 19932 | bfd *abfd = cu->per_cu->dwarf2_per_objfile->objfile->obfd; |
3019eac3 DE |
19933 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); |
19934 | ||
19935 | return read_addr_index (cu, addr_index); | |
19936 | } | |
19937 | ||
19938 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
19939 | back to dwarf2_read_addr_index. */ | |
19940 | ||
19941 | struct dwarf2_read_addr_index_data | |
19942 | { | |
19943 | ULONGEST addr_base; | |
19944 | int addr_size; | |
19945 | }; | |
19946 | ||
19947 | /* die_reader_func for dwarf2_read_addr_index. */ | |
19948 | ||
19949 | static void | |
19950 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
d521ce57 | 19951 | const gdb_byte *info_ptr, |
3019eac3 DE |
19952 | struct die_info *comp_unit_die, |
19953 | int has_children, | |
19954 | void *data) | |
19955 | { | |
19956 | struct dwarf2_cu *cu = reader->cu; | |
19957 | struct dwarf2_read_addr_index_data *aidata = | |
19958 | (struct dwarf2_read_addr_index_data *) data; | |
19959 | ||
19960 | aidata->addr_base = cu->addr_base; | |
19961 | aidata->addr_size = cu->header.addr_size; | |
19962 | } | |
19963 | ||
19964 | /* Given an index in .debug_addr, fetch the value. | |
19965 | NOTE: This can be called during dwarf expression evaluation, | |
19966 | long after the debug information has been read, and thus per_cu->cu | |
19967 | may no longer exist. */ | |
19968 | ||
19969 | CORE_ADDR | |
19970 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
19971 | unsigned int addr_index) | |
19972 | { | |
ed2dc618 | 19973 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
3019eac3 DE |
19974 | struct dwarf2_cu *cu = per_cu->cu; |
19975 | ULONGEST addr_base; | |
19976 | int addr_size; | |
19977 | ||
3019eac3 DE |
19978 | /* We need addr_base and addr_size. |
19979 | If we don't have PER_CU->cu, we have to get it. | |
19980 | Nasty, but the alternative is storing the needed info in PER_CU, | |
19981 | which at this point doesn't seem justified: it's not clear how frequently | |
19982 | it would get used and it would increase the size of every PER_CU. | |
19983 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
19984 | so we're not in uncharted territory here. | |
19985 | Alas we need to be a bit more complicated as addr_base is contained | |
19986 | in the DIE. | |
19987 | ||
19988 | We don't need to read the entire CU(/TU). | |
19989 | We just need the header and top level die. | |
a1b64ce1 | 19990 | |
3019eac3 | 19991 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 19992 | For now we skip this optimization. */ |
3019eac3 DE |
19993 | |
19994 | if (cu != NULL) | |
19995 | { | |
19996 | addr_base = cu->addr_base; | |
19997 | addr_size = cu->header.addr_size; | |
19998 | } | |
19999 | else | |
20000 | { | |
20001 | struct dwarf2_read_addr_index_data aidata; | |
20002 | ||
a1b64ce1 DE |
20003 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
20004 | we need addr_base. */ | |
58f0c718 | 20005 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, false, |
a1b64ce1 | 20006 | dwarf2_read_addr_index_reader, &aidata); |
3019eac3 DE |
20007 | addr_base = aidata.addr_base; |
20008 | addr_size = aidata.addr_size; | |
20009 | } | |
20010 | ||
ed2dc618 SM |
20011 | return read_addr_index_1 (dwarf2_per_objfile, addr_index, addr_base, |
20012 | addr_size); | |
3019eac3 DE |
20013 | } |
20014 | ||
cf532bd1 | 20015 | /* Given a DW_FORM_GNU_str_index or DW_FORM_strx, fetch the string. |
57d63ce2 | 20016 | This is only used by the Fission support. */ |
3019eac3 | 20017 | |
d521ce57 | 20018 | static const char * |
342587c4 | 20019 | read_str_index (const struct die_reader_specs *reader, ULONGEST str_index) |
3019eac3 | 20020 | { |
ed2dc618 | 20021 | struct dwarf2_cu *cu = reader->cu; |
518817b3 SM |
20022 | struct dwarf2_per_objfile *dwarf2_per_objfile |
20023 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 | 20024 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
c5164cbc | 20025 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 20026 | bfd *abfd = objfile->obfd; |
73869dc2 DE |
20027 | struct dwarf2_section_info *str_section = &reader->dwo_file->sections.str; |
20028 | struct dwarf2_section_info *str_offsets_section = | |
20029 | &reader->dwo_file->sections.str_offsets; | |
d521ce57 | 20030 | const gdb_byte *info_ptr; |
3019eac3 | 20031 | ULONGEST str_offset; |
cf532bd1 | 20032 | static const char form_name[] = "DW_FORM_GNU_str_index or DW_FORM_strx"; |
3019eac3 | 20033 | |
73869dc2 DE |
20034 | dwarf2_read_section (objfile, str_section); |
20035 | dwarf2_read_section (objfile, str_offsets_section); | |
20036 | if (str_section->buffer == NULL) | |
57d63ce2 | 20037 | error (_("%s used without .debug_str.dwo section" |
9d8780f0 SM |
20038 | " in CU at offset %s [in module %s]"), |
20039 | form_name, sect_offset_str (cu->header.sect_off), objf_name); | |
73869dc2 | 20040 | if (str_offsets_section->buffer == NULL) |
57d63ce2 | 20041 | error (_("%s used without .debug_str_offsets.dwo section" |
9d8780f0 SM |
20042 | " in CU at offset %s [in module %s]"), |
20043 | form_name, sect_offset_str (cu->header.sect_off), objf_name); | |
73869dc2 | 20044 | if (str_index * cu->header.offset_size >= str_offsets_section->size) |
57d63ce2 | 20045 | error (_("%s pointing outside of .debug_str_offsets.dwo" |
9d8780f0 SM |
20046 | " section in CU at offset %s [in module %s]"), |
20047 | form_name, sect_offset_str (cu->header.sect_off), objf_name); | |
73869dc2 | 20048 | info_ptr = (str_offsets_section->buffer |
3019eac3 DE |
20049 | + str_index * cu->header.offset_size); |
20050 | if (cu->header.offset_size == 4) | |
20051 | str_offset = bfd_get_32 (abfd, info_ptr); | |
20052 | else | |
20053 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 20054 | if (str_offset >= str_section->size) |
57d63ce2 | 20055 | error (_("Offset from %s pointing outside of" |
9d8780f0 SM |
20056 | " .debug_str.dwo section in CU at offset %s [in module %s]"), |
20057 | form_name, sect_offset_str (cu->header.sect_off), objf_name); | |
73869dc2 | 20058 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
20059 | } |
20060 | ||
3019eac3 DE |
20061 | /* Return the length of an LEB128 number in BUF. */ |
20062 | ||
20063 | static int | |
20064 | leb128_size (const gdb_byte *buf) | |
20065 | { | |
20066 | const gdb_byte *begin = buf; | |
20067 | gdb_byte byte; | |
20068 | ||
20069 | while (1) | |
20070 | { | |
20071 | byte = *buf++; | |
20072 | if ((byte & 128) == 0) | |
20073 | return buf - begin; | |
20074 | } | |
20075 | } | |
20076 | ||
c906108c | 20077 | static void |
e142c38c | 20078 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
20079 | { |
20080 | switch (lang) | |
20081 | { | |
20082 | case DW_LANG_C89: | |
76bee0cc | 20083 | case DW_LANG_C99: |
0cfd832f | 20084 | case DW_LANG_C11: |
c906108c | 20085 | case DW_LANG_C: |
d1be3247 | 20086 | case DW_LANG_UPC: |
e142c38c | 20087 | cu->language = language_c; |
c906108c | 20088 | break; |
9c37b5ae | 20089 | case DW_LANG_Java: |
c906108c | 20090 | case DW_LANG_C_plus_plus: |
0cfd832f MW |
20091 | case DW_LANG_C_plus_plus_11: |
20092 | case DW_LANG_C_plus_plus_14: | |
e142c38c | 20093 | cu->language = language_cplus; |
c906108c | 20094 | break; |
6aecb9c2 JB |
20095 | case DW_LANG_D: |
20096 | cu->language = language_d; | |
20097 | break; | |
c906108c SS |
20098 | case DW_LANG_Fortran77: |
20099 | case DW_LANG_Fortran90: | |
b21b22e0 | 20100 | case DW_LANG_Fortran95: |
f7de9aab MW |
20101 | case DW_LANG_Fortran03: |
20102 | case DW_LANG_Fortran08: | |
e142c38c | 20103 | cu->language = language_fortran; |
c906108c | 20104 | break; |
a766d390 DE |
20105 | case DW_LANG_Go: |
20106 | cu->language = language_go; | |
20107 | break; | |
c906108c | 20108 | case DW_LANG_Mips_Assembler: |
e142c38c | 20109 | cu->language = language_asm; |
c906108c SS |
20110 | break; |
20111 | case DW_LANG_Ada83: | |
8aaf0b47 | 20112 | case DW_LANG_Ada95: |
bc5f45f8 JB |
20113 | cu->language = language_ada; |
20114 | break; | |
72019c9c GM |
20115 | case DW_LANG_Modula2: |
20116 | cu->language = language_m2; | |
20117 | break; | |
fe8e67fd PM |
20118 | case DW_LANG_Pascal83: |
20119 | cu->language = language_pascal; | |
20120 | break; | |
22566fbd DJ |
20121 | case DW_LANG_ObjC: |
20122 | cu->language = language_objc; | |
20123 | break; | |
c44af4eb TT |
20124 | case DW_LANG_Rust: |
20125 | case DW_LANG_Rust_old: | |
20126 | cu->language = language_rust; | |
20127 | break; | |
c906108c SS |
20128 | case DW_LANG_Cobol74: |
20129 | case DW_LANG_Cobol85: | |
c906108c | 20130 | default: |
e142c38c | 20131 | cu->language = language_minimal; |
c906108c SS |
20132 | break; |
20133 | } | |
e142c38c | 20134 | cu->language_defn = language_def (cu->language); |
c906108c SS |
20135 | } |
20136 | ||
20137 | /* Return the named attribute or NULL if not there. */ | |
20138 | ||
20139 | static struct attribute * | |
e142c38c | 20140 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 20141 | { |
a48e046c | 20142 | for (;;) |
c906108c | 20143 | { |
a48e046c TT |
20144 | unsigned int i; |
20145 | struct attribute *spec = NULL; | |
20146 | ||
20147 | for (i = 0; i < die->num_attrs; ++i) | |
20148 | { | |
20149 | if (die->attrs[i].name == name) | |
20150 | return &die->attrs[i]; | |
20151 | if (die->attrs[i].name == DW_AT_specification | |
20152 | || die->attrs[i].name == DW_AT_abstract_origin) | |
20153 | spec = &die->attrs[i]; | |
20154 | } | |
20155 | ||
20156 | if (!spec) | |
20157 | break; | |
c906108c | 20158 | |
f2f0e013 | 20159 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 20160 | } |
c5aa993b | 20161 | |
c906108c SS |
20162 | return NULL; |
20163 | } | |
20164 | ||
348e048f DE |
20165 | /* Return the named attribute or NULL if not there, |
20166 | but do not follow DW_AT_specification, etc. | |
20167 | This is for use in contexts where we're reading .debug_types dies. | |
20168 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
20169 | back up the chain, and we want to go down. */ | |
20170 | ||
20171 | static struct attribute * | |
45e58e77 | 20172 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
20173 | { |
20174 | unsigned int i; | |
20175 | ||
20176 | for (i = 0; i < die->num_attrs; ++i) | |
20177 | if (die->attrs[i].name == name) | |
20178 | return &die->attrs[i]; | |
20179 | ||
20180 | return NULL; | |
20181 | } | |
20182 | ||
7d45c7c3 KB |
20183 | /* Return the string associated with a string-typed attribute, or NULL if it |
20184 | is either not found or is of an incorrect type. */ | |
20185 | ||
20186 | static const char * | |
20187 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) | |
20188 | { | |
20189 | struct attribute *attr; | |
20190 | const char *str = NULL; | |
20191 | ||
20192 | attr = dwarf2_attr (die, name, cu); | |
20193 | ||
20194 | if (attr != NULL) | |
20195 | { | |
43988095 | 20196 | if (attr->form == DW_FORM_strp || attr->form == DW_FORM_line_strp |
b3340438 | 20197 | || attr->form == DW_FORM_string |
cf532bd1 | 20198 | || attr->form == DW_FORM_strx |
8fe0f950 AT |
20199 | || attr->form == DW_FORM_strx1 |
20200 | || attr->form == DW_FORM_strx2 | |
20201 | || attr->form == DW_FORM_strx3 | |
20202 | || attr->form == DW_FORM_strx4 | |
b3340438 | 20203 | || attr->form == DW_FORM_GNU_str_index |
16eb6b2d | 20204 | || attr->form == DW_FORM_GNU_strp_alt) |
7d45c7c3 KB |
20205 | str = DW_STRING (attr); |
20206 | else | |
b98664d3 | 20207 | complaint (_("string type expected for attribute %s for " |
9d8780f0 SM |
20208 | "DIE at %s in module %s"), |
20209 | dwarf_attr_name (name), sect_offset_str (die->sect_off), | |
518817b3 | 20210 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
7d45c7c3 KB |
20211 | } |
20212 | ||
20213 | return str; | |
20214 | } | |
20215 | ||
a084a2a6 AT |
20216 | /* Return the dwo name or NULL if not present. If present, it is in either |
20217 | DW_AT_GNU_dwo_name or DW_AT_dwo_name atrribute. */ | |
20218 | static const char * | |
20219 | dwarf2_dwo_name (struct die_info *die, struct dwarf2_cu *cu) | |
20220 | { | |
20221 | const char *dwo_name = dwarf2_string_attr (die, DW_AT_GNU_dwo_name, cu); | |
20222 | if (dwo_name == nullptr) | |
20223 | dwo_name = dwarf2_string_attr (die, DW_AT_dwo_name, cu); | |
20224 | return dwo_name; | |
20225 | } | |
20226 | ||
05cf31d1 JB |
20227 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
20228 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 20229 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
20230 | |
20231 | static int | |
20232 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
20233 | { | |
20234 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
20235 | ||
20236 | return (attr && DW_UNSND (attr)); | |
20237 | } | |
20238 | ||
3ca72b44 | 20239 | static int |
e142c38c | 20240 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 20241 | { |
05cf31d1 JB |
20242 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
20243 | which value is non-zero. However, we have to be careful with | |
20244 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
20245 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
20246 | end up accidently finding a declaration attribute that belongs | |
20247 | to a different DIE referenced by the specification attribute, | |
20248 | even though the given DIE does not have a declaration attribute. */ | |
20249 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
20250 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
20251 | } |
20252 | ||
63d06c5c | 20253 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 20254 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
20255 | containing the return value on output. If there is no |
20256 | specification, but there is an abstract origin, that is | |
20257 | returned. */ | |
63d06c5c DC |
20258 | |
20259 | static struct die_info * | |
f2f0e013 | 20260 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 20261 | { |
f2f0e013 DJ |
20262 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
20263 | *spec_cu); | |
63d06c5c | 20264 | |
edb3359d DJ |
20265 | if (spec_attr == NULL) |
20266 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
20267 | ||
63d06c5c DC |
20268 | if (spec_attr == NULL) |
20269 | return NULL; | |
20270 | else | |
f2f0e013 | 20271 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 20272 | } |
c906108c | 20273 | |
527f3840 JK |
20274 | /* Stub for free_line_header to match void * callback types. */ |
20275 | ||
20276 | static void | |
20277 | free_line_header_voidp (void *arg) | |
20278 | { | |
9a3c8263 | 20279 | struct line_header *lh = (struct line_header *) arg; |
527f3840 | 20280 | |
fff8551c | 20281 | delete lh; |
527f3840 JK |
20282 | } |
20283 | ||
fff8551c PA |
20284 | void |
20285 | line_header::add_include_dir (const char *include_dir) | |
c906108c | 20286 | { |
27e0867f | 20287 | if (dwarf_line_debug >= 2) |
fff8551c PA |
20288 | fprintf_unfiltered (gdb_stdlog, "Adding dir %zu: %s\n", |
20289 | include_dirs.size () + 1, include_dir); | |
27e0867f | 20290 | |
fff8551c | 20291 | include_dirs.push_back (include_dir); |
debd256d | 20292 | } |
6e70227d | 20293 | |
fff8551c PA |
20294 | void |
20295 | line_header::add_file_name (const char *name, | |
ecfb656c | 20296 | dir_index d_index, |
fff8551c PA |
20297 | unsigned int mod_time, |
20298 | unsigned int length) | |
debd256d | 20299 | { |
27e0867f DE |
20300 | if (dwarf_line_debug >= 2) |
20301 | fprintf_unfiltered (gdb_stdlog, "Adding file %u: %s\n", | |
fff8551c | 20302 | (unsigned) file_names.size () + 1, name); |
27e0867f | 20303 | |
ecfb656c | 20304 | file_names.emplace_back (name, d_index, mod_time, length); |
debd256d | 20305 | } |
6e70227d | 20306 | |
83769d0b | 20307 | /* A convenience function to find the proper .debug_line section for a CU. */ |
36586728 TT |
20308 | |
20309 | static struct dwarf2_section_info * | |
20310 | get_debug_line_section (struct dwarf2_cu *cu) | |
20311 | { | |
20312 | struct dwarf2_section_info *section; | |
518817b3 SM |
20313 | struct dwarf2_per_objfile *dwarf2_per_objfile |
20314 | = cu->per_cu->dwarf2_per_objfile; | |
36586728 TT |
20315 | |
20316 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
20317 | DWO file. */ | |
20318 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
20319 | section = &cu->dwo_unit->dwo_file->sections.line; | |
20320 | else if (cu->per_cu->is_dwz) | |
20321 | { | |
ed2dc618 | 20322 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
36586728 TT |
20323 | |
20324 | section = &dwz->line; | |
20325 | } | |
20326 | else | |
20327 | section = &dwarf2_per_objfile->line; | |
20328 | ||
20329 | return section; | |
20330 | } | |
20331 | ||
43988095 JK |
20332 | /* Read directory or file name entry format, starting with byte of |
20333 | format count entries, ULEB128 pairs of entry formats, ULEB128 of | |
20334 | entries count and the entries themselves in the described entry | |
20335 | format. */ | |
20336 | ||
20337 | static void | |
ed2dc618 SM |
20338 | read_formatted_entries (struct dwarf2_per_objfile *dwarf2_per_objfile, |
20339 | bfd *abfd, const gdb_byte **bufp, | |
43988095 JK |
20340 | struct line_header *lh, |
20341 | const struct comp_unit_head *cu_header, | |
20342 | void (*callback) (struct line_header *lh, | |
20343 | const char *name, | |
ecfb656c | 20344 | dir_index d_index, |
43988095 JK |
20345 | unsigned int mod_time, |
20346 | unsigned int length)) | |
20347 | { | |
20348 | gdb_byte format_count, formati; | |
20349 | ULONGEST data_count, datai; | |
20350 | const gdb_byte *buf = *bufp; | |
20351 | const gdb_byte *format_header_data; | |
43988095 JK |
20352 | unsigned int bytes_read; |
20353 | ||
20354 | format_count = read_1_byte (abfd, buf); | |
20355 | buf += 1; | |
20356 | format_header_data = buf; | |
20357 | for (formati = 0; formati < format_count; formati++) | |
20358 | { | |
20359 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
20360 | buf += bytes_read; | |
20361 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
20362 | buf += bytes_read; | |
20363 | } | |
20364 | ||
20365 | data_count = read_unsigned_leb128 (abfd, buf, &bytes_read); | |
20366 | buf += bytes_read; | |
20367 | for (datai = 0; datai < data_count; datai++) | |
20368 | { | |
20369 | const gdb_byte *format = format_header_data; | |
20370 | struct file_entry fe; | |
20371 | ||
43988095 JK |
20372 | for (formati = 0; formati < format_count; formati++) |
20373 | { | |
ecfb656c | 20374 | ULONGEST content_type = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 20375 | format += bytes_read; |
43988095 | 20376 | |
ecfb656c | 20377 | ULONGEST form = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 20378 | format += bytes_read; |
ecfb656c PA |
20379 | |
20380 | gdb::optional<const char *> string; | |
20381 | gdb::optional<unsigned int> uint; | |
20382 | ||
43988095 JK |
20383 | switch (form) |
20384 | { | |
20385 | case DW_FORM_string: | |
ecfb656c | 20386 | string.emplace (read_direct_string (abfd, buf, &bytes_read)); |
43988095 JK |
20387 | buf += bytes_read; |
20388 | break; | |
20389 | ||
20390 | case DW_FORM_line_strp: | |
ed2dc618 SM |
20391 | string.emplace (read_indirect_line_string (dwarf2_per_objfile, |
20392 | abfd, buf, | |
ecfb656c PA |
20393 | cu_header, |
20394 | &bytes_read)); | |
43988095 JK |
20395 | buf += bytes_read; |
20396 | break; | |
20397 | ||
20398 | case DW_FORM_data1: | |
ecfb656c | 20399 | uint.emplace (read_1_byte (abfd, buf)); |
43988095 JK |
20400 | buf += 1; |
20401 | break; | |
20402 | ||
20403 | case DW_FORM_data2: | |
ecfb656c | 20404 | uint.emplace (read_2_bytes (abfd, buf)); |
43988095 JK |
20405 | buf += 2; |
20406 | break; | |
20407 | ||
20408 | case DW_FORM_data4: | |
ecfb656c | 20409 | uint.emplace (read_4_bytes (abfd, buf)); |
43988095 JK |
20410 | buf += 4; |
20411 | break; | |
20412 | ||
20413 | case DW_FORM_data8: | |
ecfb656c | 20414 | uint.emplace (read_8_bytes (abfd, buf)); |
43988095 JK |
20415 | buf += 8; |
20416 | break; | |
20417 | ||
20418 | case DW_FORM_udata: | |
ecfb656c | 20419 | uint.emplace (read_unsigned_leb128 (abfd, buf, &bytes_read)); |
43988095 JK |
20420 | buf += bytes_read; |
20421 | break; | |
20422 | ||
20423 | case DW_FORM_block: | |
20424 | /* It is valid only for DW_LNCT_timestamp which is ignored by | |
20425 | current GDB. */ | |
20426 | break; | |
20427 | } | |
ecfb656c PA |
20428 | |
20429 | switch (content_type) | |
20430 | { | |
20431 | case DW_LNCT_path: | |
20432 | if (string.has_value ()) | |
20433 | fe.name = *string; | |
20434 | break; | |
20435 | case DW_LNCT_directory_index: | |
20436 | if (uint.has_value ()) | |
20437 | fe.d_index = (dir_index) *uint; | |
20438 | break; | |
20439 | case DW_LNCT_timestamp: | |
20440 | if (uint.has_value ()) | |
20441 | fe.mod_time = *uint; | |
20442 | break; | |
20443 | case DW_LNCT_size: | |
20444 | if (uint.has_value ()) | |
20445 | fe.length = *uint; | |
20446 | break; | |
20447 | case DW_LNCT_MD5: | |
20448 | break; | |
20449 | default: | |
b98664d3 | 20450 | complaint (_("Unknown format content type %s"), |
ecfb656c PA |
20451 | pulongest (content_type)); |
20452 | } | |
43988095 JK |
20453 | } |
20454 | ||
ecfb656c | 20455 | callback (lh, fe.name, fe.d_index, fe.mod_time, fe.length); |
43988095 JK |
20456 | } |
20457 | ||
20458 | *bufp = buf; | |
20459 | } | |
20460 | ||
debd256d | 20461 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 20462 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 20463 | to a struct line_header, allocated using xmalloc. |
cd366ee8 DE |
20464 | Returns NULL if there is a problem reading the header, e.g., if it |
20465 | has a version we don't understand. | |
debd256d JB |
20466 | |
20467 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
20468 | the returned object point into the dwarf line section buffer, |
20469 | and must not be freed. */ | |
ae2de4f8 | 20470 | |
fff8551c | 20471 | static line_header_up |
9c541725 | 20472 | dwarf_decode_line_header (sect_offset sect_off, struct dwarf2_cu *cu) |
debd256d | 20473 | { |
d521ce57 | 20474 | const gdb_byte *line_ptr; |
c764a876 | 20475 | unsigned int bytes_read, offset_size; |
debd256d | 20476 | int i; |
d521ce57 | 20477 | const char *cur_dir, *cur_file; |
3019eac3 DE |
20478 | struct dwarf2_section_info *section; |
20479 | bfd *abfd; | |
518817b3 SM |
20480 | struct dwarf2_per_objfile *dwarf2_per_objfile |
20481 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 | 20482 | |
36586728 | 20483 | section = get_debug_line_section (cu); |
3019eac3 DE |
20484 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
20485 | if (section->buffer == NULL) | |
debd256d | 20486 | { |
3019eac3 | 20487 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
b98664d3 | 20488 | complaint (_("missing .debug_line.dwo section")); |
3019eac3 | 20489 | else |
b98664d3 | 20490 | complaint (_("missing .debug_line section")); |
debd256d JB |
20491 | return 0; |
20492 | } | |
20493 | ||
fceca515 DE |
20494 | /* We can't do this until we know the section is non-empty. |
20495 | Only then do we know we have such a section. */ | |
a32a8923 | 20496 | abfd = get_section_bfd_owner (section); |
fceca515 | 20497 | |
a738430d MK |
20498 | /* Make sure that at least there's room for the total_length field. |
20499 | That could be 12 bytes long, but we're just going to fudge that. */ | |
9c541725 | 20500 | if (to_underlying (sect_off) + 4 >= section->size) |
debd256d | 20501 | { |
4d3c2250 | 20502 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
20503 | return 0; |
20504 | } | |
20505 | ||
fff8551c | 20506 | line_header_up lh (new line_header ()); |
debd256d | 20507 | |
9c541725 | 20508 | lh->sect_off = sect_off; |
527f3840 JK |
20509 | lh->offset_in_dwz = cu->per_cu->is_dwz; |
20510 | ||
9c541725 | 20511 | line_ptr = section->buffer + to_underlying (sect_off); |
debd256d | 20512 | |
a738430d | 20513 | /* Read in the header. */ |
6e70227d | 20514 | lh->total_length = |
c764a876 DE |
20515 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
20516 | &bytes_read, &offset_size); | |
debd256d | 20517 | line_ptr += bytes_read; |
3019eac3 | 20518 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 20519 | { |
4d3c2250 | 20520 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
20521 | return 0; |
20522 | } | |
20523 | lh->statement_program_end = line_ptr + lh->total_length; | |
20524 | lh->version = read_2_bytes (abfd, line_ptr); | |
20525 | line_ptr += 2; | |
43988095 | 20526 | if (lh->version > 5) |
cd366ee8 DE |
20527 | { |
20528 | /* This is a version we don't understand. The format could have | |
20529 | changed in ways we don't handle properly so just punt. */ | |
b98664d3 | 20530 | complaint (_("unsupported version in .debug_line section")); |
cd366ee8 DE |
20531 | return NULL; |
20532 | } | |
43988095 JK |
20533 | if (lh->version >= 5) |
20534 | { | |
20535 | gdb_byte segment_selector_size; | |
20536 | ||
20537 | /* Skip address size. */ | |
20538 | read_1_byte (abfd, line_ptr); | |
20539 | line_ptr += 1; | |
20540 | ||
20541 | segment_selector_size = read_1_byte (abfd, line_ptr); | |
20542 | line_ptr += 1; | |
20543 | if (segment_selector_size != 0) | |
20544 | { | |
b98664d3 | 20545 | complaint (_("unsupported segment selector size %u " |
43988095 JK |
20546 | "in .debug_line section"), |
20547 | segment_selector_size); | |
20548 | return NULL; | |
20549 | } | |
20550 | } | |
c764a876 DE |
20551 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
20552 | line_ptr += offset_size; | |
debd256d JB |
20553 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
20554 | line_ptr += 1; | |
2dc7f7b3 TT |
20555 | if (lh->version >= 4) |
20556 | { | |
20557 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
20558 | line_ptr += 1; | |
20559 | } | |
20560 | else | |
20561 | lh->maximum_ops_per_instruction = 1; | |
20562 | ||
20563 | if (lh->maximum_ops_per_instruction == 0) | |
20564 | { | |
20565 | lh->maximum_ops_per_instruction = 1; | |
b98664d3 | 20566 | complaint (_("invalid maximum_ops_per_instruction " |
3e43a32a | 20567 | "in `.debug_line' section")); |
2dc7f7b3 TT |
20568 | } |
20569 | ||
debd256d JB |
20570 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
20571 | line_ptr += 1; | |
20572 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
20573 | line_ptr += 1; | |
20574 | lh->line_range = read_1_byte (abfd, line_ptr); | |
20575 | line_ptr += 1; | |
20576 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
20577 | line_ptr += 1; | |
fff8551c | 20578 | lh->standard_opcode_lengths.reset (new unsigned char[lh->opcode_base]); |
debd256d JB |
20579 | |
20580 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
20581 | for (i = 1; i < lh->opcode_base; ++i) | |
20582 | { | |
20583 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
20584 | line_ptr += 1; | |
20585 | } | |
20586 | ||
43988095 | 20587 | if (lh->version >= 5) |
debd256d | 20588 | { |
43988095 | 20589 | /* Read directory table. */ |
ed2dc618 SM |
20590 | read_formatted_entries (dwarf2_per_objfile, abfd, &line_ptr, lh.get (), |
20591 | &cu->header, | |
b926417a | 20592 | [] (struct line_header *header, const char *name, |
ecfb656c | 20593 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
20594 | unsigned int length) |
20595 | { | |
b926417a | 20596 | header->add_include_dir (name); |
fff8551c | 20597 | }); |
debd256d | 20598 | |
43988095 | 20599 | /* Read file name table. */ |
ed2dc618 SM |
20600 | read_formatted_entries (dwarf2_per_objfile, abfd, &line_ptr, lh.get (), |
20601 | &cu->header, | |
b926417a | 20602 | [] (struct line_header *header, const char *name, |
ecfb656c | 20603 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
20604 | unsigned int length) |
20605 | { | |
b926417a | 20606 | header->add_file_name (name, d_index, mod_time, length); |
fff8551c | 20607 | }); |
43988095 JK |
20608 | } |
20609 | else | |
debd256d | 20610 | { |
43988095 JK |
20611 | /* Read directory table. */ |
20612 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
20613 | { | |
20614 | line_ptr += bytes_read; | |
fff8551c | 20615 | lh->add_include_dir (cur_dir); |
43988095 | 20616 | } |
debd256d JB |
20617 | line_ptr += bytes_read; |
20618 | ||
43988095 JK |
20619 | /* Read file name table. */ |
20620 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
20621 | { | |
ecfb656c PA |
20622 | unsigned int mod_time, length; |
20623 | dir_index d_index; | |
43988095 JK |
20624 | |
20625 | line_ptr += bytes_read; | |
ecfb656c | 20626 | d_index = (dir_index) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
43988095 JK |
20627 | line_ptr += bytes_read; |
20628 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20629 | line_ptr += bytes_read; | |
20630 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20631 | line_ptr += bytes_read; | |
20632 | ||
ecfb656c | 20633 | lh->add_file_name (cur_file, d_index, mod_time, length); |
43988095 JK |
20634 | } |
20635 | line_ptr += bytes_read; | |
debd256d | 20636 | } |
6e70227d | 20637 | lh->statement_program_start = line_ptr; |
debd256d | 20638 | |
3019eac3 | 20639 | if (line_ptr > (section->buffer + section->size)) |
b98664d3 | 20640 | complaint (_("line number info header doesn't " |
3e43a32a | 20641 | "fit in `.debug_line' section")); |
debd256d | 20642 | |
debd256d JB |
20643 | return lh; |
20644 | } | |
c906108c | 20645 | |
c6da4cef DE |
20646 | /* Subroutine of dwarf_decode_lines to simplify it. |
20647 | Return the file name of the psymtab for included file FILE_INDEX | |
20648 | in line header LH of PST. | |
20649 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
c89b44cd TT |
20650 | If space for the result is malloc'd, *NAME_HOLDER will be set. |
20651 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */ | |
c6da4cef | 20652 | |
d521ce57 | 20653 | static const char * |
c6da4cef DE |
20654 | psymtab_include_file_name (const struct line_header *lh, int file_index, |
20655 | const struct partial_symtab *pst, | |
c89b44cd TT |
20656 | const char *comp_dir, |
20657 | gdb::unique_xmalloc_ptr<char> *name_holder) | |
c6da4cef | 20658 | { |
8c43009f | 20659 | const file_entry &fe = lh->file_names[file_index]; |
d521ce57 TT |
20660 | const char *include_name = fe.name; |
20661 | const char *include_name_to_compare = include_name; | |
72b9f47f | 20662 | const char *pst_filename; |
c6da4cef DE |
20663 | int file_is_pst; |
20664 | ||
8c43009f | 20665 | const char *dir_name = fe.include_dir (lh); |
c6da4cef | 20666 | |
c89b44cd | 20667 | gdb::unique_xmalloc_ptr<char> hold_compare; |
c6da4cef DE |
20668 | if (!IS_ABSOLUTE_PATH (include_name) |
20669 | && (dir_name != NULL || comp_dir != NULL)) | |
20670 | { | |
20671 | /* Avoid creating a duplicate psymtab for PST. | |
20672 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
20673 | Before we do the comparison, however, we need to account | |
20674 | for DIR_NAME and COMP_DIR. | |
20675 | First prepend dir_name (if non-NULL). If we still don't | |
20676 | have an absolute path prepend comp_dir (if non-NULL). | |
20677 | However, the directory we record in the include-file's | |
20678 | psymtab does not contain COMP_DIR (to match the | |
20679 | corresponding symtab(s)). | |
20680 | ||
20681 | Example: | |
20682 | ||
20683 | bash$ cd /tmp | |
20684 | bash$ gcc -g ./hello.c | |
20685 | include_name = "hello.c" | |
20686 | dir_name = "." | |
20687 | DW_AT_comp_dir = comp_dir = "/tmp" | |
5f52445b YQ |
20688 | DW_AT_name = "./hello.c" |
20689 | ||
20690 | */ | |
c6da4cef DE |
20691 | |
20692 | if (dir_name != NULL) | |
20693 | { | |
c89b44cd TT |
20694 | name_holder->reset (concat (dir_name, SLASH_STRING, |
20695 | include_name, (char *) NULL)); | |
20696 | include_name = name_holder->get (); | |
c6da4cef | 20697 | include_name_to_compare = include_name; |
c6da4cef DE |
20698 | } |
20699 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
20700 | { | |
c89b44cd TT |
20701 | hold_compare.reset (concat (comp_dir, SLASH_STRING, |
20702 | include_name, (char *) NULL)); | |
20703 | include_name_to_compare = hold_compare.get (); | |
c6da4cef DE |
20704 | } |
20705 | } | |
20706 | ||
20707 | pst_filename = pst->filename; | |
c89b44cd | 20708 | gdb::unique_xmalloc_ptr<char> copied_name; |
c6da4cef DE |
20709 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) |
20710 | { | |
c89b44cd TT |
20711 | copied_name.reset (concat (pst->dirname, SLASH_STRING, |
20712 | pst_filename, (char *) NULL)); | |
20713 | pst_filename = copied_name.get (); | |
c6da4cef DE |
20714 | } |
20715 | ||
1e3fad37 | 20716 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 20717 | |
c6da4cef DE |
20718 | if (file_is_pst) |
20719 | return NULL; | |
20720 | return include_name; | |
20721 | } | |
20722 | ||
d9b3de22 DE |
20723 | /* State machine to track the state of the line number program. */ |
20724 | ||
6f77053d | 20725 | class lnp_state_machine |
d9b3de22 | 20726 | { |
6f77053d PA |
20727 | public: |
20728 | /* Initialize a machine state for the start of a line number | |
20729 | program. */ | |
804d2729 TT |
20730 | lnp_state_machine (struct dwarf2_cu *cu, gdbarch *arch, line_header *lh, |
20731 | bool record_lines_p); | |
6f77053d | 20732 | |
8c43009f PA |
20733 | file_entry *current_file () |
20734 | { | |
20735 | /* lh->file_names is 0-based, but the file name numbers in the | |
20736 | statement program are 1-based. */ | |
6f77053d PA |
20737 | return m_line_header->file_name_at (m_file); |
20738 | } | |
20739 | ||
20740 | /* Record the line in the state machine. END_SEQUENCE is true if | |
20741 | we're processing the end of a sequence. */ | |
20742 | void record_line (bool end_sequence); | |
20743 | ||
7ab6656f OJ |
20744 | /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true |
20745 | nop-out rest of the lines in this sequence. */ | |
6f77053d PA |
20746 | void check_line_address (struct dwarf2_cu *cu, |
20747 | const gdb_byte *line_ptr, | |
7ab6656f | 20748 | CORE_ADDR unrelocated_lowpc, CORE_ADDR address); |
6f77053d PA |
20749 | |
20750 | void handle_set_discriminator (unsigned int discriminator) | |
20751 | { | |
20752 | m_discriminator = discriminator; | |
20753 | m_line_has_non_zero_discriminator |= discriminator != 0; | |
20754 | } | |
20755 | ||
20756 | /* Handle DW_LNE_set_address. */ | |
20757 | void handle_set_address (CORE_ADDR baseaddr, CORE_ADDR address) | |
20758 | { | |
20759 | m_op_index = 0; | |
20760 | address += baseaddr; | |
20761 | m_address = gdbarch_adjust_dwarf2_line (m_gdbarch, address, false); | |
20762 | } | |
20763 | ||
20764 | /* Handle DW_LNS_advance_pc. */ | |
20765 | void handle_advance_pc (CORE_ADDR adjust); | |
20766 | ||
20767 | /* Handle a special opcode. */ | |
20768 | void handle_special_opcode (unsigned char op_code); | |
20769 | ||
20770 | /* Handle DW_LNS_advance_line. */ | |
20771 | void handle_advance_line (int line_delta) | |
20772 | { | |
20773 | advance_line (line_delta); | |
20774 | } | |
20775 | ||
20776 | /* Handle DW_LNS_set_file. */ | |
20777 | void handle_set_file (file_name_index file); | |
20778 | ||
20779 | /* Handle DW_LNS_negate_stmt. */ | |
20780 | void handle_negate_stmt () | |
20781 | { | |
20782 | m_is_stmt = !m_is_stmt; | |
20783 | } | |
20784 | ||
20785 | /* Handle DW_LNS_const_add_pc. */ | |
20786 | void handle_const_add_pc (); | |
20787 | ||
20788 | /* Handle DW_LNS_fixed_advance_pc. */ | |
20789 | void handle_fixed_advance_pc (CORE_ADDR addr_adj) | |
20790 | { | |
20791 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
20792 | m_op_index = 0; | |
20793 | } | |
20794 | ||
20795 | /* Handle DW_LNS_copy. */ | |
20796 | void handle_copy () | |
20797 | { | |
20798 | record_line (false); | |
20799 | m_discriminator = 0; | |
20800 | } | |
20801 | ||
20802 | /* Handle DW_LNE_end_sequence. */ | |
20803 | void handle_end_sequence () | |
20804 | { | |
804d2729 | 20805 | m_currently_recording_lines = true; |
6f77053d PA |
20806 | } |
20807 | ||
20808 | private: | |
20809 | /* Advance the line by LINE_DELTA. */ | |
20810 | void advance_line (int line_delta) | |
20811 | { | |
20812 | m_line += line_delta; | |
20813 | ||
20814 | if (line_delta != 0) | |
20815 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
8c43009f PA |
20816 | } |
20817 | ||
804d2729 TT |
20818 | struct dwarf2_cu *m_cu; |
20819 | ||
6f77053d PA |
20820 | gdbarch *m_gdbarch; |
20821 | ||
20822 | /* True if we're recording lines. | |
20823 | Otherwise we're building partial symtabs and are just interested in | |
20824 | finding include files mentioned by the line number program. */ | |
20825 | bool m_record_lines_p; | |
20826 | ||
8c43009f | 20827 | /* The line number header. */ |
6f77053d | 20828 | line_header *m_line_header; |
8c43009f | 20829 | |
6f77053d PA |
20830 | /* These are part of the standard DWARF line number state machine, |
20831 | and initialized according to the DWARF spec. */ | |
d9b3de22 | 20832 | |
6f77053d | 20833 | unsigned char m_op_index = 0; |
8c43009f | 20834 | /* The line table index (1-based) of the current file. */ |
6f77053d PA |
20835 | file_name_index m_file = (file_name_index) 1; |
20836 | unsigned int m_line = 1; | |
20837 | ||
20838 | /* These are initialized in the constructor. */ | |
20839 | ||
20840 | CORE_ADDR m_address; | |
20841 | bool m_is_stmt; | |
20842 | unsigned int m_discriminator; | |
d9b3de22 DE |
20843 | |
20844 | /* Additional bits of state we need to track. */ | |
20845 | ||
20846 | /* The last file that we called dwarf2_start_subfile for. | |
20847 | This is only used for TLLs. */ | |
6f77053d | 20848 | unsigned int m_last_file = 0; |
d9b3de22 | 20849 | /* The last file a line number was recorded for. */ |
6f77053d | 20850 | struct subfile *m_last_subfile = NULL; |
d9b3de22 | 20851 | |
804d2729 TT |
20852 | /* When true, record the lines we decode. */ |
20853 | bool m_currently_recording_lines = false; | |
d9b3de22 DE |
20854 | |
20855 | /* The last line number that was recorded, used to coalesce | |
20856 | consecutive entries for the same line. This can happen, for | |
20857 | example, when discriminators are present. PR 17276. */ | |
6f77053d PA |
20858 | unsigned int m_last_line = 0; |
20859 | bool m_line_has_non_zero_discriminator = false; | |
8c43009f | 20860 | }; |
d9b3de22 | 20861 | |
6f77053d PA |
20862 | void |
20863 | lnp_state_machine::handle_advance_pc (CORE_ADDR adjust) | |
20864 | { | |
20865 | CORE_ADDR addr_adj = (((m_op_index + adjust) | |
20866 | / m_line_header->maximum_ops_per_instruction) | |
20867 | * m_line_header->minimum_instruction_length); | |
20868 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
20869 | m_op_index = ((m_op_index + adjust) | |
20870 | % m_line_header->maximum_ops_per_instruction); | |
20871 | } | |
d9b3de22 | 20872 | |
6f77053d PA |
20873 | void |
20874 | lnp_state_machine::handle_special_opcode (unsigned char op_code) | |
d9b3de22 | 20875 | { |
6f77053d PA |
20876 | unsigned char adj_opcode = op_code - m_line_header->opcode_base; |
20877 | CORE_ADDR addr_adj = (((m_op_index | |
20878 | + (adj_opcode / m_line_header->line_range)) | |
20879 | / m_line_header->maximum_ops_per_instruction) | |
20880 | * m_line_header->minimum_instruction_length); | |
20881 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
20882 | m_op_index = ((m_op_index + (adj_opcode / m_line_header->line_range)) | |
20883 | % m_line_header->maximum_ops_per_instruction); | |
d9b3de22 | 20884 | |
6f77053d PA |
20885 | int line_delta = (m_line_header->line_base |
20886 | + (adj_opcode % m_line_header->line_range)); | |
20887 | advance_line (line_delta); | |
20888 | record_line (false); | |
20889 | m_discriminator = 0; | |
20890 | } | |
d9b3de22 | 20891 | |
6f77053d PA |
20892 | void |
20893 | lnp_state_machine::handle_set_file (file_name_index file) | |
20894 | { | |
20895 | m_file = file; | |
20896 | ||
20897 | const file_entry *fe = current_file (); | |
20898 | if (fe == NULL) | |
20899 | dwarf2_debug_line_missing_file_complaint (); | |
20900 | else if (m_record_lines_p) | |
20901 | { | |
20902 | const char *dir = fe->include_dir (m_line_header); | |
20903 | ||
c24bdb02 | 20904 | m_last_subfile = m_cu->get_builder ()->get_current_subfile (); |
6f77053d | 20905 | m_line_has_non_zero_discriminator = m_discriminator != 0; |
804d2729 | 20906 | dwarf2_start_subfile (m_cu, fe->name, dir); |
6f77053d PA |
20907 | } |
20908 | } | |
20909 | ||
20910 | void | |
20911 | lnp_state_machine::handle_const_add_pc () | |
20912 | { | |
20913 | CORE_ADDR adjust | |
20914 | = (255 - m_line_header->opcode_base) / m_line_header->line_range; | |
20915 | ||
20916 | CORE_ADDR addr_adj | |
20917 | = (((m_op_index + adjust) | |
20918 | / m_line_header->maximum_ops_per_instruction) | |
20919 | * m_line_header->minimum_instruction_length); | |
20920 | ||
20921 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
20922 | m_op_index = ((m_op_index + adjust) | |
20923 | % m_line_header->maximum_ops_per_instruction); | |
20924 | } | |
d9b3de22 | 20925 | |
a05a36a5 DE |
20926 | /* Return non-zero if we should add LINE to the line number table. |
20927 | LINE is the line to add, LAST_LINE is the last line that was added, | |
20928 | LAST_SUBFILE is the subfile for LAST_LINE. | |
20929 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever | |
20930 | had a non-zero discriminator. | |
20931 | ||
20932 | We have to be careful in the presence of discriminators. | |
20933 | E.g., for this line: | |
20934 | ||
20935 | for (i = 0; i < 100000; i++); | |
20936 | ||
20937 | clang can emit four line number entries for that one line, | |
20938 | each with a different discriminator. | |
20939 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. | |
20940 | ||
20941 | However, we want gdb to coalesce all four entries into one. | |
20942 | Otherwise the user could stepi into the middle of the line and | |
20943 | gdb would get confused about whether the pc really was in the | |
20944 | middle of the line. | |
20945 | ||
20946 | Things are further complicated by the fact that two consecutive | |
20947 | line number entries for the same line is a heuristic used by gcc | |
20948 | to denote the end of the prologue. So we can't just discard duplicate | |
20949 | entries, we have to be selective about it. The heuristic we use is | |
20950 | that we only collapse consecutive entries for the same line if at least | |
20951 | one of those entries has a non-zero discriminator. PR 17276. | |
20952 | ||
20953 | Note: Addresses in the line number state machine can never go backwards | |
20954 | within one sequence, thus this coalescing is ok. */ | |
20955 | ||
20956 | static int | |
804d2729 TT |
20957 | dwarf_record_line_p (struct dwarf2_cu *cu, |
20958 | unsigned int line, unsigned int last_line, | |
a05a36a5 DE |
20959 | int line_has_non_zero_discriminator, |
20960 | struct subfile *last_subfile) | |
20961 | { | |
c24bdb02 | 20962 | if (cu->get_builder ()->get_current_subfile () != last_subfile) |
a05a36a5 DE |
20963 | return 1; |
20964 | if (line != last_line) | |
20965 | return 1; | |
20966 | /* Same line for the same file that we've seen already. | |
20967 | As a last check, for pr 17276, only record the line if the line | |
20968 | has never had a non-zero discriminator. */ | |
20969 | if (!line_has_non_zero_discriminator) | |
20970 | return 1; | |
20971 | return 0; | |
20972 | } | |
20973 | ||
804d2729 TT |
20974 | /* Use the CU's builder to record line number LINE beginning at |
20975 | address ADDRESS in the line table of subfile SUBFILE. */ | |
252a6764 DE |
20976 | |
20977 | static void | |
d9b3de22 DE |
20978 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
20979 | unsigned int line, CORE_ADDR address, | |
804d2729 | 20980 | struct dwarf2_cu *cu) |
252a6764 DE |
20981 | { |
20982 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); | |
20983 | ||
27e0867f DE |
20984 | if (dwarf_line_debug) |
20985 | { | |
20986 | fprintf_unfiltered (gdb_stdlog, | |
20987 | "Recording line %u, file %s, address %s\n", | |
20988 | line, lbasename (subfile->name), | |
20989 | paddress (gdbarch, address)); | |
20990 | } | |
20991 | ||
804d2729 | 20992 | if (cu != nullptr) |
c24bdb02 | 20993 | cu->get_builder ()->record_line (subfile, line, addr); |
252a6764 DE |
20994 | } |
20995 | ||
20996 | /* Subroutine of dwarf_decode_lines_1 to simplify it. | |
20997 | Mark the end of a set of line number records. | |
d9b3de22 | 20998 | The arguments are the same as for dwarf_record_line_1. |
252a6764 DE |
20999 | If SUBFILE is NULL the request is ignored. */ |
21000 | ||
21001 | static void | |
21002 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
804d2729 | 21003 | CORE_ADDR address, struct dwarf2_cu *cu) |
252a6764 | 21004 | { |
27e0867f DE |
21005 | if (subfile == NULL) |
21006 | return; | |
21007 | ||
21008 | if (dwarf_line_debug) | |
21009 | { | |
21010 | fprintf_unfiltered (gdb_stdlog, | |
21011 | "Finishing current line, file %s, address %s\n", | |
21012 | lbasename (subfile->name), | |
21013 | paddress (gdbarch, address)); | |
21014 | } | |
21015 | ||
804d2729 | 21016 | dwarf_record_line_1 (gdbarch, subfile, 0, address, cu); |
d9b3de22 DE |
21017 | } |
21018 | ||
6f77053d PA |
21019 | void |
21020 | lnp_state_machine::record_line (bool end_sequence) | |
d9b3de22 | 21021 | { |
d9b3de22 DE |
21022 | if (dwarf_line_debug) |
21023 | { | |
21024 | fprintf_unfiltered (gdb_stdlog, | |
21025 | "Processing actual line %u: file %u," | |
21026 | " address %s, is_stmt %u, discrim %u\n", | |
6f77053d PA |
21027 | m_line, to_underlying (m_file), |
21028 | paddress (m_gdbarch, m_address), | |
21029 | m_is_stmt, m_discriminator); | |
d9b3de22 DE |
21030 | } |
21031 | ||
6f77053d | 21032 | file_entry *fe = current_file (); |
8c43009f PA |
21033 | |
21034 | if (fe == NULL) | |
d9b3de22 DE |
21035 | dwarf2_debug_line_missing_file_complaint (); |
21036 | /* For now we ignore lines not starting on an instruction boundary. | |
21037 | But not when processing end_sequence for compatibility with the | |
21038 | previous version of the code. */ | |
6f77053d | 21039 | else if (m_op_index == 0 || end_sequence) |
d9b3de22 | 21040 | { |
8c43009f | 21041 | fe->included_p = 1; |
c258c396 | 21042 | if (m_record_lines_p && (producer_is_codewarrior (m_cu) || m_is_stmt)) |
d9b3de22 | 21043 | { |
c24bdb02 | 21044 | if (m_last_subfile != m_cu->get_builder ()->get_current_subfile () |
804d2729 | 21045 | || end_sequence) |
d9b3de22 | 21046 | { |
804d2729 TT |
21047 | dwarf_finish_line (m_gdbarch, m_last_subfile, m_address, |
21048 | m_currently_recording_lines ? m_cu : nullptr); | |
d9b3de22 DE |
21049 | } |
21050 | ||
21051 | if (!end_sequence) | |
21052 | { | |
804d2729 | 21053 | if (dwarf_record_line_p (m_cu, m_line, m_last_line, |
6f77053d PA |
21054 | m_line_has_non_zero_discriminator, |
21055 | m_last_subfile)) | |
d9b3de22 | 21056 | { |
c24bdb02 | 21057 | buildsym_compunit *builder = m_cu->get_builder (); |
804d2729 | 21058 | dwarf_record_line_1 (m_gdbarch, |
c24bdb02 | 21059 | builder->get_current_subfile (), |
6f77053d | 21060 | m_line, m_address, |
804d2729 | 21061 | m_currently_recording_lines ? m_cu : nullptr); |
d9b3de22 | 21062 | } |
c24bdb02 | 21063 | m_last_subfile = m_cu->get_builder ()->get_current_subfile (); |
6f77053d | 21064 | m_last_line = m_line; |
d9b3de22 DE |
21065 | } |
21066 | } | |
21067 | } | |
21068 | } | |
21069 | ||
804d2729 TT |
21070 | lnp_state_machine::lnp_state_machine (struct dwarf2_cu *cu, gdbarch *arch, |
21071 | line_header *lh, bool record_lines_p) | |
d9b3de22 | 21072 | { |
804d2729 | 21073 | m_cu = cu; |
6f77053d PA |
21074 | m_gdbarch = arch; |
21075 | m_record_lines_p = record_lines_p; | |
21076 | m_line_header = lh; | |
d9b3de22 | 21077 | |
804d2729 | 21078 | m_currently_recording_lines = true; |
d9b3de22 | 21079 | |
d9b3de22 DE |
21080 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there |
21081 | was a line entry for it so that the backend has a chance to adjust it | |
21082 | and also record it in case it needs it. This is currently used by MIPS | |
21083 | code, cf. `mips_adjust_dwarf2_line'. */ | |
6f77053d PA |
21084 | m_address = gdbarch_adjust_dwarf2_line (arch, 0, 0); |
21085 | m_is_stmt = lh->default_is_stmt; | |
21086 | m_discriminator = 0; | |
252a6764 DE |
21087 | } |
21088 | ||
6f77053d PA |
21089 | void |
21090 | lnp_state_machine::check_line_address (struct dwarf2_cu *cu, | |
21091 | const gdb_byte *line_ptr, | |
7ab6656f | 21092 | CORE_ADDR unrelocated_lowpc, CORE_ADDR address) |
924c2928 | 21093 | { |
7ab6656f OJ |
21094 | /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside |
21095 | the pc range of the CU. However, we restrict the test to only ADDRESS | |
21096 | values of zero to preserve GDB's previous behaviour which is to handle | |
21097 | the specific case of a function being GC'd by the linker. */ | |
924c2928 | 21098 | |
7ab6656f | 21099 | if (address == 0 && address < unrelocated_lowpc) |
924c2928 DE |
21100 | { |
21101 | /* This line table is for a function which has been | |
21102 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
21103 | ||
518817b3 | 21104 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
924c2928 DE |
21105 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; |
21106 | ||
b98664d3 | 21107 | complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"), |
924c2928 | 21108 | line_offset, objfile_name (objfile)); |
804d2729 TT |
21109 | m_currently_recording_lines = false; |
21110 | /* Note: m_currently_recording_lines is left as false until we see | |
21111 | DW_LNE_end_sequence. */ | |
924c2928 DE |
21112 | } |
21113 | } | |
21114 | ||
f3f5162e | 21115 | /* Subroutine of dwarf_decode_lines to simplify it. |
d9b3de22 DE |
21116 | Process the line number information in LH. |
21117 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number | |
21118 | program in order to set included_p for every referenced header. */ | |
debd256d | 21119 | |
c906108c | 21120 | static void |
43f3e411 DE |
21121 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
21122 | const int decode_for_pst_p, CORE_ADDR lowpc) | |
c906108c | 21123 | { |
d521ce57 TT |
21124 | const gdb_byte *line_ptr, *extended_end; |
21125 | const gdb_byte *line_end; | |
a8c50c1f | 21126 | unsigned int bytes_read, extended_len; |
699ca60a | 21127 | unsigned char op_code, extended_op; |
e142c38c | 21128 | CORE_ADDR baseaddr; |
518817b3 | 21129 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
f3f5162e | 21130 | bfd *abfd = objfile->obfd; |
fbf65064 | 21131 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
6f77053d PA |
21132 | /* True if we're recording line info (as opposed to building partial |
21133 | symtabs and just interested in finding include files mentioned by | |
21134 | the line number program). */ | |
21135 | bool record_lines_p = !decode_for_pst_p; | |
e142c38c DJ |
21136 | |
21137 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 21138 | |
debd256d JB |
21139 | line_ptr = lh->statement_program_start; |
21140 | line_end = lh->statement_program_end; | |
c906108c SS |
21141 | |
21142 | /* Read the statement sequences until there's nothing left. */ | |
21143 | while (line_ptr < line_end) | |
21144 | { | |
6f77053d PA |
21145 | /* The DWARF line number program state machine. Reset the state |
21146 | machine at the start of each sequence. */ | |
804d2729 | 21147 | lnp_state_machine state_machine (cu, gdbarch, lh, record_lines_p); |
6f77053d | 21148 | bool end_sequence = false; |
d9b3de22 | 21149 | |
8c43009f | 21150 | if (record_lines_p) |
c906108c | 21151 | { |
8c43009f PA |
21152 | /* Start a subfile for the current file of the state |
21153 | machine. */ | |
21154 | const file_entry *fe = state_machine.current_file (); | |
21155 | ||
21156 | if (fe != NULL) | |
804d2729 | 21157 | dwarf2_start_subfile (cu, fe->name, fe->include_dir (lh)); |
c906108c SS |
21158 | } |
21159 | ||
a738430d | 21160 | /* Decode the table. */ |
d9b3de22 | 21161 | while (line_ptr < line_end && !end_sequence) |
c906108c SS |
21162 | { |
21163 | op_code = read_1_byte (abfd, line_ptr); | |
21164 | line_ptr += 1; | |
9aa1fe7e | 21165 | |
debd256d | 21166 | if (op_code >= lh->opcode_base) |
6e70227d | 21167 | { |
8e07a239 | 21168 | /* Special opcode. */ |
6f77053d | 21169 | state_machine.handle_special_opcode (op_code); |
9aa1fe7e GK |
21170 | } |
21171 | else switch (op_code) | |
c906108c SS |
21172 | { |
21173 | case DW_LNS_extended_op: | |
3e43a32a MS |
21174 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
21175 | &bytes_read); | |
473b7be6 | 21176 | line_ptr += bytes_read; |
a8c50c1f | 21177 | extended_end = line_ptr + extended_len; |
c906108c SS |
21178 | extended_op = read_1_byte (abfd, line_ptr); |
21179 | line_ptr += 1; | |
21180 | switch (extended_op) | |
21181 | { | |
21182 | case DW_LNE_end_sequence: | |
6f77053d PA |
21183 | state_machine.handle_end_sequence (); |
21184 | end_sequence = true; | |
c906108c SS |
21185 | break; |
21186 | case DW_LNE_set_address: | |
d9b3de22 DE |
21187 | { |
21188 | CORE_ADDR address | |
21189 | = read_address (abfd, line_ptr, cu, &bytes_read); | |
d9b3de22 | 21190 | line_ptr += bytes_read; |
6f77053d PA |
21191 | |
21192 | state_machine.check_line_address (cu, line_ptr, | |
7ab6656f | 21193 | lowpc - baseaddr, address); |
6f77053d | 21194 | state_machine.handle_set_address (baseaddr, address); |
d9b3de22 | 21195 | } |
c906108c SS |
21196 | break; |
21197 | case DW_LNE_define_file: | |
debd256d | 21198 | { |
d521ce57 | 21199 | const char *cur_file; |
ecfb656c PA |
21200 | unsigned int mod_time, length; |
21201 | dir_index dindex; | |
6e70227d | 21202 | |
3e43a32a MS |
21203 | cur_file = read_direct_string (abfd, line_ptr, |
21204 | &bytes_read); | |
debd256d | 21205 | line_ptr += bytes_read; |
ecfb656c | 21206 | dindex = (dir_index) |
debd256d JB |
21207 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
21208 | line_ptr += bytes_read; | |
21209 | mod_time = | |
21210 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
21211 | line_ptr += bytes_read; | |
21212 | length = | |
21213 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
21214 | line_ptr += bytes_read; | |
ecfb656c | 21215 | lh->add_file_name (cur_file, dindex, mod_time, length); |
debd256d | 21216 | } |
c906108c | 21217 | break; |
d0c6ba3d | 21218 | case DW_LNE_set_discriminator: |
6f77053d PA |
21219 | { |
21220 | /* The discriminator is not interesting to the | |
21221 | debugger; just ignore it. We still need to | |
21222 | check its value though: | |
21223 | if there are consecutive entries for the same | |
21224 | (non-prologue) line we want to coalesce them. | |
21225 | PR 17276. */ | |
21226 | unsigned int discr | |
21227 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
21228 | line_ptr += bytes_read; | |
21229 | ||
21230 | state_machine.handle_set_discriminator (discr); | |
21231 | } | |
d0c6ba3d | 21232 | break; |
c906108c | 21233 | default: |
b98664d3 | 21234 | complaint (_("mangled .debug_line section")); |
debd256d | 21235 | return; |
c906108c | 21236 | } |
a8c50c1f DJ |
21237 | /* Make sure that we parsed the extended op correctly. If e.g. |
21238 | we expected a different address size than the producer used, | |
21239 | we may have read the wrong number of bytes. */ | |
21240 | if (line_ptr != extended_end) | |
21241 | { | |
b98664d3 | 21242 | complaint (_("mangled .debug_line section")); |
a8c50c1f DJ |
21243 | return; |
21244 | } | |
c906108c SS |
21245 | break; |
21246 | case DW_LNS_copy: | |
6f77053d | 21247 | state_machine.handle_copy (); |
c906108c SS |
21248 | break; |
21249 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
21250 | { |
21251 | CORE_ADDR adjust | |
21252 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
2dc7f7b3 | 21253 | line_ptr += bytes_read; |
6f77053d PA |
21254 | |
21255 | state_machine.handle_advance_pc (adjust); | |
2dc7f7b3 | 21256 | } |
c906108c SS |
21257 | break; |
21258 | case DW_LNS_advance_line: | |
a05a36a5 DE |
21259 | { |
21260 | int line_delta | |
21261 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
a05a36a5 | 21262 | line_ptr += bytes_read; |
6f77053d PA |
21263 | |
21264 | state_machine.handle_advance_line (line_delta); | |
a05a36a5 | 21265 | } |
c906108c SS |
21266 | break; |
21267 | case DW_LNS_set_file: | |
d9b3de22 | 21268 | { |
6f77053d | 21269 | file_name_index file |
ecfb656c PA |
21270 | = (file_name_index) read_unsigned_leb128 (abfd, line_ptr, |
21271 | &bytes_read); | |
d9b3de22 | 21272 | line_ptr += bytes_read; |
8c43009f | 21273 | |
6f77053d | 21274 | state_machine.handle_set_file (file); |
d9b3de22 | 21275 | } |
c906108c SS |
21276 | break; |
21277 | case DW_LNS_set_column: | |
0ad93d4f | 21278 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
c906108c SS |
21279 | line_ptr += bytes_read; |
21280 | break; | |
21281 | case DW_LNS_negate_stmt: | |
6f77053d | 21282 | state_machine.handle_negate_stmt (); |
c906108c SS |
21283 | break; |
21284 | case DW_LNS_set_basic_block: | |
c906108c | 21285 | break; |
c2c6d25f JM |
21286 | /* Add to the address register of the state machine the |
21287 | address increment value corresponding to special opcode | |
a738430d MK |
21288 | 255. I.e., this value is scaled by the minimum |
21289 | instruction length since special opcode 255 would have | |
b021a221 | 21290 | scaled the increment. */ |
c906108c | 21291 | case DW_LNS_const_add_pc: |
6f77053d | 21292 | state_machine.handle_const_add_pc (); |
c906108c SS |
21293 | break; |
21294 | case DW_LNS_fixed_advance_pc: | |
3e29f34a | 21295 | { |
6f77053d | 21296 | CORE_ADDR addr_adj = read_2_bytes (abfd, line_ptr); |
3e29f34a | 21297 | line_ptr += 2; |
6f77053d PA |
21298 | |
21299 | state_machine.handle_fixed_advance_pc (addr_adj); | |
3e29f34a | 21300 | } |
c906108c | 21301 | break; |
9aa1fe7e | 21302 | default: |
a738430d MK |
21303 | { |
21304 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 21305 | int i; |
a738430d | 21306 | |
debd256d | 21307 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
21308 | { |
21309 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
21310 | line_ptr += bytes_read; | |
21311 | } | |
21312 | } | |
c906108c SS |
21313 | } |
21314 | } | |
d9b3de22 DE |
21315 | |
21316 | if (!end_sequence) | |
21317 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
21318 | ||
21319 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, | |
21320 | in which case we still finish recording the last line). */ | |
6f77053d | 21321 | state_machine.record_line (true); |
c906108c | 21322 | } |
f3f5162e DE |
21323 | } |
21324 | ||
21325 | /* Decode the Line Number Program (LNP) for the given line_header | |
21326 | structure and CU. The actual information extracted and the type | |
21327 | of structures created from the LNP depends on the value of PST. | |
21328 | ||
21329 | 1. If PST is NULL, then this procedure uses the data from the program | |
21330 | to create all necessary symbol tables, and their linetables. | |
21331 | ||
21332 | 2. If PST is not NULL, this procedure reads the program to determine | |
21333 | the list of files included by the unit represented by PST, and | |
21334 | builds all the associated partial symbol tables. | |
21335 | ||
21336 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
21337 | It is used for relative paths in the line table. | |
21338 | NOTE: When processing partial symtabs (pst != NULL), | |
21339 | comp_dir == pst->dirname. | |
21340 | ||
21341 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
21342 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
21343 | symtab we don't use it in the name of the psymtabs we create. | |
21344 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
c3b7b696 YQ |
21345 | A good testcase for this is mb-inline.exp. |
21346 | ||
527f3840 JK |
21347 | LOWPC is the lowest address in CU (or 0 if not known). |
21348 | ||
21349 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line | |
21350 | for its PC<->lines mapping information. Otherwise only the filename | |
21351 | table is read in. */ | |
f3f5162e DE |
21352 | |
21353 | static void | |
21354 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
c3b7b696 | 21355 | struct dwarf2_cu *cu, struct partial_symtab *pst, |
527f3840 | 21356 | CORE_ADDR lowpc, int decode_mapping) |
f3f5162e | 21357 | { |
518817b3 | 21358 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
f3f5162e | 21359 | const int decode_for_pst_p = (pst != NULL); |
f3f5162e | 21360 | |
527f3840 JK |
21361 | if (decode_mapping) |
21362 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); | |
aaa75496 JB |
21363 | |
21364 | if (decode_for_pst_p) | |
21365 | { | |
21366 | int file_index; | |
21367 | ||
21368 | /* Now that we're done scanning the Line Header Program, we can | |
21369 | create the psymtab of each included file. */ | |
fff8551c | 21370 | for (file_index = 0; file_index < lh->file_names.size (); file_index++) |
aaa75496 JB |
21371 | if (lh->file_names[file_index].included_p == 1) |
21372 | { | |
c89b44cd | 21373 | gdb::unique_xmalloc_ptr<char> name_holder; |
d521ce57 | 21374 | const char *include_name = |
c89b44cd TT |
21375 | psymtab_include_file_name (lh, file_index, pst, comp_dir, |
21376 | &name_holder); | |
c6da4cef | 21377 | if (include_name != NULL) |
aaa75496 JB |
21378 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
21379 | } | |
21380 | } | |
cb1df416 DJ |
21381 | else |
21382 | { | |
21383 | /* Make sure a symtab is created for every file, even files | |
21384 | which contain only variables (i.e. no code with associated | |
21385 | line numbers). */ | |
c24bdb02 KS |
21386 | buildsym_compunit *builder = cu->get_builder (); |
21387 | struct compunit_symtab *cust = builder->get_compunit_symtab (); | |
cb1df416 | 21388 | int i; |
cb1df416 | 21389 | |
fff8551c | 21390 | for (i = 0; i < lh->file_names.size (); i++) |
cb1df416 | 21391 | { |
8c43009f | 21392 | file_entry &fe = lh->file_names[i]; |
9a619af0 | 21393 | |
804d2729 | 21394 | dwarf2_start_subfile (cu, fe.name, fe.include_dir (lh)); |
cb1df416 | 21395 | |
c24bdb02 | 21396 | if (builder->get_current_subfile ()->symtab == NULL) |
43f3e411 | 21397 | { |
c24bdb02 | 21398 | builder->get_current_subfile ()->symtab |
804d2729 | 21399 | = allocate_symtab (cust, |
c24bdb02 | 21400 | builder->get_current_subfile ()->name); |
43f3e411 | 21401 | } |
c24bdb02 | 21402 | fe.symtab = builder->get_current_subfile ()->symtab; |
cb1df416 DJ |
21403 | } |
21404 | } | |
c906108c SS |
21405 | } |
21406 | ||
21407 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
21408 | DIRNAME the name of the source directory which contains FILENAME | |
4d663531 | 21409 | or NULL if not known. |
c906108c SS |
21410 | This routine tries to keep line numbers from identical absolute and |
21411 | relative file names in a common subfile. | |
21412 | ||
21413 | Using the `list' example from the GDB testsuite, which resides in | |
21414 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
21415 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
21416 | ||
c5aa993b | 21417 | DW_AT_name: /srcdir/list0.c |
4d663531 | 21418 | DW_AT_comp_dir: /compdir |
357e46e7 | 21419 | files.files[0].name: list0.h |
c5aa993b | 21420 | files.files[0].dir: /srcdir |
357e46e7 | 21421 | files.files[1].name: list0.c |
c5aa993b | 21422 | files.files[1].dir: /srcdir |
c906108c SS |
21423 | |
21424 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
21425 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
21426 | start_subfile will ensure that this happens provided that we pass the | |
21427 | concatenation of files.files[1].dir and files.files[1].name as the | |
21428 | subfile's name. */ | |
c906108c SS |
21429 | |
21430 | static void | |
804d2729 TT |
21431 | dwarf2_start_subfile (struct dwarf2_cu *cu, const char *filename, |
21432 | const char *dirname) | |
c906108c | 21433 | { |
d521ce57 | 21434 | char *copy = NULL; |
4f1520fb | 21435 | |
4d663531 | 21436 | /* In order not to lose the line information directory, |
4f1520fb FR |
21437 | we concatenate it to the filename when it makes sense. |
21438 | Note that the Dwarf3 standard says (speaking of filenames in line | |
21439 | information): ``The directory index is ignored for file names | |
21440 | that represent full path names''. Thus ignoring dirname in the | |
21441 | `else' branch below isn't an issue. */ | |
c906108c | 21442 | |
d5166ae1 | 21443 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 TT |
21444 | { |
21445 | copy = concat (dirname, SLASH_STRING, filename, (char *)NULL); | |
21446 | filename = copy; | |
21447 | } | |
c906108c | 21448 | |
c24bdb02 | 21449 | cu->get_builder ()->start_subfile (filename); |
4f1520fb | 21450 | |
d521ce57 TT |
21451 | if (copy != NULL) |
21452 | xfree (copy); | |
c906108c SS |
21453 | } |
21454 | ||
804d2729 TT |
21455 | /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the |
21456 | buildsym_compunit constructor. */ | |
f4dc4d17 | 21457 | |
c24bdb02 KS |
21458 | struct compunit_symtab * |
21459 | dwarf2_cu::start_symtab (const char *name, const char *comp_dir, | |
21460 | CORE_ADDR low_pc) | |
f4dc4d17 | 21461 | { |
c24bdb02 | 21462 | gdb_assert (m_builder == nullptr); |
43f3e411 | 21463 | |
c24bdb02 KS |
21464 | m_builder.reset (new struct buildsym_compunit |
21465 | (per_cu->dwarf2_per_objfile->objfile, | |
21466 | name, comp_dir, language, low_pc)); | |
93b8bea4 | 21467 | |
c24bdb02 | 21468 | list_in_scope = get_builder ()->get_file_symbols (); |
804d2729 | 21469 | |
c24bdb02 KS |
21470 | get_builder ()->record_debugformat ("DWARF 2"); |
21471 | get_builder ()->record_producer (producer); | |
f4dc4d17 | 21472 | |
c24bdb02 | 21473 | processing_has_namespace_info = false; |
43f3e411 | 21474 | |
c24bdb02 | 21475 | return get_builder ()->get_compunit_symtab (); |
f4dc4d17 DE |
21476 | } |
21477 | ||
4c2df51b DJ |
21478 | static void |
21479 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 21480 | struct dwarf2_cu *cu) |
4c2df51b | 21481 | { |
518817b3 | 21482 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
e7c27a73 DJ |
21483 | struct comp_unit_head *cu_header = &cu->header; |
21484 | ||
4c2df51b DJ |
21485 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
21486 | code here to turn a symbol with DW_AT_external and a | |
21487 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
21488 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
21489 | with some versions of binutils) where shared libraries could have | |
21490 | relocations against symbols in their debug information - the | |
21491 | minimal symbol would have the right address, but the debug info | |
21492 | would not. It's no longer necessary, because we will explicitly | |
21493 | apply relocations when we read in the debug information now. */ | |
21494 | ||
21495 | /* A DW_AT_location attribute with no contents indicates that a | |
21496 | variable has been optimized away. */ | |
21497 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
21498 | { | |
f1e6e072 | 21499 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
21500 | return; |
21501 | } | |
21502 | ||
21503 | /* Handle one degenerate form of location expression specially, to | |
21504 | preserve GDB's previous behavior when section offsets are | |
336d760d AT |
21505 | specified. If this is just a DW_OP_addr, DW_OP_addrx, or |
21506 | DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
21507 | |
21508 | if (attr_form_is_block (attr) | |
3019eac3 DE |
21509 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
21510 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
336d760d AT |
21511 | || ((DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index |
21512 | || DW_BLOCK (attr)->data[0] == DW_OP_addrx) | |
3019eac3 DE |
21513 | && (DW_BLOCK (attr)->size |
21514 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 21515 | { |
891d2f0b | 21516 | unsigned int dummy; |
4c2df51b | 21517 | |
3019eac3 | 21518 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
38583298 TT |
21519 | SET_SYMBOL_VALUE_ADDRESS (sym, |
21520 | read_address (objfile->obfd, | |
21521 | DW_BLOCK (attr)->data + 1, | |
21522 | cu, &dummy)); | |
3019eac3 | 21523 | else |
38583298 TT |
21524 | SET_SYMBOL_VALUE_ADDRESS |
21525 | (sym, read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, | |
21526 | &dummy)); | |
f1e6e072 | 21527 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b | 21528 | fixup_symbol_section (sym, objfile); |
38583298 TT |
21529 | SET_SYMBOL_VALUE_ADDRESS (sym, |
21530 | SYMBOL_VALUE_ADDRESS (sym) | |
21531 | + ANOFFSET (objfile->section_offsets, | |
21532 | SYMBOL_SECTION (sym))); | |
4c2df51b DJ |
21533 | return; |
21534 | } | |
21535 | ||
21536 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
21537 | expression evaluator, and use LOC_COMPUTED only when necessary | |
21538 | (i.e. when the value of a register or memory location is | |
21539 | referenced, or a thread-local block, etc.). Then again, it might | |
21540 | not be worthwhile. I'm assuming that it isn't unless performance | |
21541 | or memory numbers show me otherwise. */ | |
21542 | ||
f1e6e072 | 21543 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 21544 | |
f1e6e072 | 21545 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
9068261f | 21546 | cu->has_loclist = true; |
4c2df51b DJ |
21547 | } |
21548 | ||
c906108c SS |
21549 | /* Given a pointer to a DWARF information entry, figure out if we need |
21550 | to make a symbol table entry for it, and if so, create a new entry | |
21551 | and return a pointer to it. | |
21552 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
21553 | used the passed type. |
21554 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
21555 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
21556 | |
21557 | static struct symbol * | |
5e2db402 TT |
21558 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
21559 | struct symbol *space) | |
c906108c | 21560 | { |
518817b3 SM |
21561 | struct dwarf2_per_objfile *dwarf2_per_objfile |
21562 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 21563 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 21564 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 21565 | struct symbol *sym = NULL; |
15d034d0 | 21566 | const char *name; |
c906108c SS |
21567 | struct attribute *attr = NULL; |
21568 | struct attribute *attr2 = NULL; | |
e142c38c | 21569 | CORE_ADDR baseaddr; |
e37fd15a SW |
21570 | struct pending **list_to_add = NULL; |
21571 | ||
edb3359d | 21572 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
21573 | |
21574 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 21575 | |
94af9270 | 21576 | name = dwarf2_name (die, cu); |
c906108c SS |
21577 | if (name) |
21578 | { | |
94af9270 | 21579 | const char *linkagename; |
34eaf542 | 21580 | int suppress_add = 0; |
94af9270 | 21581 | |
34eaf542 TT |
21582 | if (space) |
21583 | sym = space; | |
21584 | else | |
e623cf5d | 21585 | sym = allocate_symbol (objfile); |
c906108c | 21586 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
21587 | |
21588 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
f85f34ed | 21589 | SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack); |
94af9270 KS |
21590 | linkagename = dwarf2_physname (name, die, cu); |
21591 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); | |
c906108c | 21592 | |
f55ee35c JK |
21593 | /* Fortran does not have mangling standard and the mangling does differ |
21594 | between gfortran, iFort etc. */ | |
21595 | if (cu->language == language_fortran | |
b250c185 | 21596 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
29df156d | 21597 | symbol_set_demangled_name (&(sym->ginfo), |
cfc594ee | 21598 | dwarf2_full_name (name, die, cu), |
29df156d | 21599 | NULL); |
f55ee35c | 21600 | |
c906108c | 21601 | /* Default assumptions. |
c5aa993b | 21602 | Use the passed type or decode it from the die. */ |
176620f1 | 21603 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 21604 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
21605 | if (type != NULL) |
21606 | SYMBOL_TYPE (sym) = type; | |
21607 | else | |
e7c27a73 | 21608 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
21609 | attr = dwarf2_attr (die, |
21610 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
21611 | cu); | |
c906108c SS |
21612 | if (attr) |
21613 | { | |
21614 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
21615 | } | |
cb1df416 | 21616 | |
edb3359d DJ |
21617 | attr = dwarf2_attr (die, |
21618 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
21619 | cu); | |
cb1df416 DJ |
21620 | if (attr) |
21621 | { | |
ecfb656c | 21622 | file_name_index file_index = (file_name_index) DW_UNSND (attr); |
8c43009f | 21623 | struct file_entry *fe; |
9a619af0 | 21624 | |
ecfb656c PA |
21625 | if (cu->line_header != NULL) |
21626 | fe = cu->line_header->file_name_at (file_index); | |
8c43009f PA |
21627 | else |
21628 | fe = NULL; | |
21629 | ||
21630 | if (fe == NULL) | |
b98664d3 | 21631 | complaint (_("file index out of range")); |
8c43009f PA |
21632 | else |
21633 | symbol_set_symtab (sym, fe->symtab); | |
cb1df416 DJ |
21634 | } |
21635 | ||
c906108c SS |
21636 | switch (die->tag) |
21637 | { | |
21638 | case DW_TAG_label: | |
e142c38c | 21639 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c | 21640 | if (attr) |
3e29f34a MR |
21641 | { |
21642 | CORE_ADDR addr; | |
21643 | ||
21644 | addr = attr_value_as_address (attr); | |
21645 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); | |
38583298 | 21646 | SET_SYMBOL_VALUE_ADDRESS (sym, addr); |
3e29f34a | 21647 | } |
0f5238ed TT |
21648 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
21649 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 21650 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
d3cb6808 | 21651 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
21652 | break; |
21653 | case DW_TAG_subprogram: | |
21654 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
21655 | finish_block. */ | |
f1e6e072 | 21656 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 21657 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d | 21658 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
0a4b0913 AB |
21659 | || cu->language == language_ada |
21660 | || cu->language == language_fortran) | |
c906108c | 21661 | { |
2cfa0c8d | 21662 | /* Subprograms marked external are stored as a global symbol. |
0a4b0913 AB |
21663 | Ada and Fortran subprograms, whether marked external or |
21664 | not, are always stored as a global symbol, because we want | |
21665 | to be able to access them globally. For instance, we want | |
21666 | to be able to break on a nested subprogram without having | |
21667 | to specify the context. */ | |
c24bdb02 | 21668 | list_to_add = cu->get_builder ()->get_global_symbols (); |
c906108c SS |
21669 | } |
21670 | else | |
21671 | { | |
e37fd15a | 21672 | list_to_add = cu->list_in_scope; |
c906108c SS |
21673 | } |
21674 | break; | |
edb3359d DJ |
21675 | case DW_TAG_inlined_subroutine: |
21676 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
21677 | finish_block. */ | |
f1e6e072 | 21678 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 21679 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 21680 | list_to_add = cu->list_in_scope; |
edb3359d | 21681 | break; |
34eaf542 TT |
21682 | case DW_TAG_template_value_param: |
21683 | suppress_add = 1; | |
21684 | /* Fall through. */ | |
72929c62 | 21685 | case DW_TAG_constant: |
c906108c | 21686 | case DW_TAG_variable: |
254e6b9e | 21687 | case DW_TAG_member: |
0963b4bd MS |
21688 | /* Compilation with minimal debug info may result in |
21689 | variables with missing type entries. Change the | |
21690 | misleading `void' type to something sensible. */ | |
c906108c | 21691 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
46a4882b | 21692 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_int; |
64c50499 | 21693 | |
e142c38c | 21694 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
21695 | /* In the case of DW_TAG_member, we should only be called for |
21696 | static const members. */ | |
21697 | if (die->tag == DW_TAG_member) | |
21698 | { | |
3863f96c DE |
21699 | /* dwarf2_add_field uses die_is_declaration, |
21700 | so we do the same. */ | |
254e6b9e DE |
21701 | gdb_assert (die_is_declaration (die, cu)); |
21702 | gdb_assert (attr); | |
21703 | } | |
c906108c SS |
21704 | if (attr) |
21705 | { | |
e7c27a73 | 21706 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 21707 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 21708 | if (!suppress_add) |
34eaf542 TT |
21709 | { |
21710 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
c24bdb02 | 21711 | list_to_add = cu->get_builder ()->get_global_symbols (); |
34eaf542 | 21712 | else |
e37fd15a | 21713 | list_to_add = cu->list_in_scope; |
34eaf542 | 21714 | } |
c906108c SS |
21715 | break; |
21716 | } | |
e142c38c | 21717 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
21718 | if (attr) |
21719 | { | |
e7c27a73 | 21720 | var_decode_location (attr, sym, cu); |
e142c38c | 21721 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
21722 | |
21723 | /* Fortran explicitly imports any global symbols to the local | |
21724 | scope by DW_TAG_common_block. */ | |
21725 | if (cu->language == language_fortran && die->parent | |
21726 | && die->parent->tag == DW_TAG_common_block) | |
21727 | attr2 = NULL; | |
21728 | ||
caac4577 JG |
21729 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
21730 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
21731 | && !dwarf2_per_objfile->has_section_at_zero) | |
21732 | { | |
21733 | /* When a static variable is eliminated by the linker, | |
21734 | the corresponding debug information is not stripped | |
21735 | out, but the variable address is set to null; | |
21736 | do not add such variables into symbol table. */ | |
21737 | } | |
21738 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 21739 | { |
4b610737 TT |
21740 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
21741 | && (objfile->flags & OBJF_MAINLINE) == 0 | |
21742 | && dwarf2_per_objfile->can_copy) | |
21743 | { | |
21744 | /* A global static variable might be subject to | |
21745 | copy relocation. We first check for a local | |
21746 | minsym, though, because maybe the symbol was | |
21747 | marked hidden, in which case this would not | |
21748 | apply. */ | |
21749 | bound_minimal_symbol found | |
21750 | = (lookup_minimal_symbol_linkage | |
21751 | (SYMBOL_LINKAGE_NAME (sym), objfile)); | |
21752 | if (found.minsym != nullptr) | |
21753 | sym->maybe_copied = 1; | |
21754 | } | |
f55ee35c | 21755 | |
1c809c68 TT |
21756 | /* A variable with DW_AT_external is never static, |
21757 | but it may be block-scoped. */ | |
804d2729 | 21758 | list_to_add |
c24bdb02 KS |
21759 | = ((cu->list_in_scope |
21760 | == cu->get_builder ()->get_file_symbols ()) | |
21761 | ? cu->get_builder ()->get_global_symbols () | |
804d2729 | 21762 | : cu->list_in_scope); |
1c809c68 | 21763 | } |
c906108c | 21764 | else |
e37fd15a | 21765 | list_to_add = cu->list_in_scope; |
c906108c SS |
21766 | } |
21767 | else | |
21768 | { | |
21769 | /* We do not know the address of this symbol. | |
c5aa993b JM |
21770 | If it is an external symbol and we have type information |
21771 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
21772 | The address of the variable will then be determined from | |
21773 | the minimal symbol table whenever the variable is | |
21774 | referenced. */ | |
e142c38c | 21775 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
21776 | |
21777 | /* Fortran explicitly imports any global symbols to the local | |
21778 | scope by DW_TAG_common_block. */ | |
21779 | if (cu->language == language_fortran && die->parent | |
21780 | && die->parent->tag == DW_TAG_common_block) | |
21781 | { | |
21782 | /* SYMBOL_CLASS doesn't matter here because | |
21783 | read_common_block is going to reset it. */ | |
21784 | if (!suppress_add) | |
21785 | list_to_add = cu->list_in_scope; | |
21786 | } | |
21787 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
21788 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 21789 | { |
0fe7935b DJ |
21790 | /* A variable with DW_AT_external is never static, but it |
21791 | may be block-scoped. */ | |
804d2729 | 21792 | list_to_add |
c24bdb02 KS |
21793 | = ((cu->list_in_scope |
21794 | == cu->get_builder ()->get_file_symbols ()) | |
21795 | ? cu->get_builder ()->get_global_symbols () | |
804d2729 | 21796 | : cu->list_in_scope); |
0fe7935b | 21797 | |
f1e6e072 | 21798 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 21799 | } |
442ddf59 JK |
21800 | else if (!die_is_declaration (die, cu)) |
21801 | { | |
21802 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
21803 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
21804 | if (!suppress_add) |
21805 | list_to_add = cu->list_in_scope; | |
442ddf59 | 21806 | } |
c906108c SS |
21807 | } |
21808 | break; | |
21809 | case DW_TAG_formal_parameter: | |
a60f3166 TT |
21810 | { |
21811 | /* If we are inside a function, mark this as an argument. If | |
21812 | not, we might be looking at an argument to an inlined function | |
21813 | when we do not have enough information to show inlined frames; | |
21814 | pretend it's a local variable in that case so that the user can | |
21815 | still see it. */ | |
804d2729 | 21816 | struct context_stack *curr |
c24bdb02 | 21817 | = cu->get_builder ()->get_current_context_stack (); |
a60f3166 TT |
21818 | if (curr != nullptr && curr->name != nullptr) |
21819 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
21820 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
21821 | if (attr) | |
21822 | { | |
21823 | var_decode_location (attr, sym, cu); | |
21824 | } | |
21825 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
21826 | if (attr) | |
21827 | { | |
21828 | dwarf2_const_value (attr, sym, cu); | |
21829 | } | |
f346a30d | 21830 | |
a60f3166 TT |
21831 | list_to_add = cu->list_in_scope; |
21832 | } | |
c906108c SS |
21833 | break; |
21834 | case DW_TAG_unspecified_parameters: | |
21835 | /* From varargs functions; gdb doesn't seem to have any | |
21836 | interest in this information, so just ignore it for now. | |
21837 | (FIXME?) */ | |
21838 | break; | |
34eaf542 TT |
21839 | case DW_TAG_template_type_param: |
21840 | suppress_add = 1; | |
21841 | /* Fall through. */ | |
c906108c | 21842 | case DW_TAG_class_type: |
680b30c7 | 21843 | case DW_TAG_interface_type: |
c906108c SS |
21844 | case DW_TAG_structure_type: |
21845 | case DW_TAG_union_type: | |
72019c9c | 21846 | case DW_TAG_set_type: |
c906108c | 21847 | case DW_TAG_enumeration_type: |
f1e6e072 | 21848 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 21849 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 21850 | |
63d06c5c | 21851 | { |
9c37b5ae | 21852 | /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't |
63d06c5c DC |
21853 | really ever be static objects: otherwise, if you try |
21854 | to, say, break of a class's method and you're in a file | |
21855 | which doesn't mention that class, it won't work unless | |
21856 | the check for all static symbols in lookup_symbol_aux | |
21857 | saves you. See the OtherFileClass tests in | |
21858 | gdb.c++/namespace.exp. */ | |
21859 | ||
e37fd15a | 21860 | if (!suppress_add) |
34eaf542 | 21861 | { |
c24bdb02 | 21862 | buildsym_compunit *builder = cu->get_builder (); |
804d2729 | 21863 | list_to_add |
c24bdb02 | 21864 | = (cu->list_in_scope == builder->get_file_symbols () |
804d2729 | 21865 | && cu->language == language_cplus |
c24bdb02 | 21866 | ? builder->get_global_symbols () |
804d2729 | 21867 | : cu->list_in_scope); |
63d06c5c | 21868 | |
64382290 | 21869 | /* The semantics of C++ state that "struct foo { |
9c37b5ae | 21870 | ... }" also defines a typedef for "foo". */ |
64382290 | 21871 | if (cu->language == language_cplus |
45280282 | 21872 | || cu->language == language_ada |
c44af4eb TT |
21873 | || cu->language == language_d |
21874 | || cu->language == language_rust) | |
64382290 TT |
21875 | { |
21876 | /* The symbol's name is already allocated along | |
21877 | with this objfile, so we don't need to | |
21878 | duplicate it for the type. */ | |
21879 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
21880 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); | |
21881 | } | |
63d06c5c DC |
21882 | } |
21883 | } | |
c906108c SS |
21884 | break; |
21885 | case DW_TAG_typedef: | |
f1e6e072 | 21886 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 21887 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 21888 | list_to_add = cu->list_in_scope; |
63d06c5c | 21889 | break; |
c906108c | 21890 | case DW_TAG_base_type: |
a02abb62 | 21891 | case DW_TAG_subrange_type: |
f1e6e072 | 21892 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 21893 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 21894 | list_to_add = cu->list_in_scope; |
c906108c SS |
21895 | break; |
21896 | case DW_TAG_enumerator: | |
e142c38c | 21897 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
21898 | if (attr) |
21899 | { | |
e7c27a73 | 21900 | dwarf2_const_value (attr, sym, cu); |
c906108c | 21901 | } |
63d06c5c DC |
21902 | { |
21903 | /* NOTE: carlton/2003-11-10: See comment above in the | |
21904 | DW_TAG_class_type, etc. block. */ | |
21905 | ||
804d2729 | 21906 | list_to_add |
c24bdb02 | 21907 | = (cu->list_in_scope == cu->get_builder ()->get_file_symbols () |
804d2729 | 21908 | && cu->language == language_cplus |
c24bdb02 | 21909 | ? cu->get_builder ()->get_global_symbols () |
804d2729 | 21910 | : cu->list_in_scope); |
63d06c5c | 21911 | } |
c906108c | 21912 | break; |
74921315 | 21913 | case DW_TAG_imported_declaration: |
5c4e30ca | 21914 | case DW_TAG_namespace: |
f1e6e072 | 21915 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
c24bdb02 | 21916 | list_to_add = cu->get_builder ()->get_global_symbols (); |
5c4e30ca | 21917 | break; |
530e8392 KB |
21918 | case DW_TAG_module: |
21919 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
21920 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
c24bdb02 | 21921 | list_to_add = cu->get_builder ()->get_global_symbols (); |
530e8392 | 21922 | break; |
4357ac6c | 21923 | case DW_TAG_common_block: |
f1e6e072 | 21924 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c | 21925 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
d3cb6808 | 21926 | add_symbol_to_list (sym, cu->list_in_scope); |
4357ac6c | 21927 | break; |
c906108c SS |
21928 | default: |
21929 | /* Not a tag we recognize. Hopefully we aren't processing | |
21930 | trash data, but since we must specifically ignore things | |
21931 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 21932 | this point. */ |
b98664d3 | 21933 | complaint (_("unsupported tag: '%s'"), |
4d3c2250 | 21934 | dwarf_tag_name (die->tag)); |
c906108c SS |
21935 | break; |
21936 | } | |
df8a16a1 | 21937 | |
e37fd15a SW |
21938 | if (suppress_add) |
21939 | { | |
21940 | sym->hash_next = objfile->template_symbols; | |
21941 | objfile->template_symbols = sym; | |
21942 | list_to_add = NULL; | |
21943 | } | |
21944 | ||
21945 | if (list_to_add != NULL) | |
d3cb6808 | 21946 | add_symbol_to_list (sym, list_to_add); |
e37fd15a | 21947 | |
df8a16a1 DJ |
21948 | /* For the benefit of old versions of GCC, check for anonymous |
21949 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 21950 | if (!cu->processing_has_namespace_info |
94af9270 | 21951 | && cu->language == language_cplus) |
c24bdb02 | 21952 | cp_scan_for_anonymous_namespaces (cu->get_builder (), sym, objfile); |
c906108c SS |
21953 | } |
21954 | return (sym); | |
21955 | } | |
21956 | ||
98bfdba5 PA |
21957 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
21958 | zero-extend it as appropriate for the symbol's type. The DWARF | |
21959 | standard (v4) is not entirely clear about the meaning of using | |
21960 | DW_FORM_dataN for a constant with a signed type, where the type is | |
21961 | wider than the data. The conclusion of a discussion on the DWARF | |
21962 | list was that this is unspecified. We choose to always zero-extend | |
21963 | because that is the interpretation long in use by GCC. */ | |
c906108c | 21964 | |
98bfdba5 | 21965 | static gdb_byte * |
ff39bb5e | 21966 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 21967 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 21968 | { |
518817b3 | 21969 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
e17a4113 UW |
21970 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
21971 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
21972 | LONGEST l = DW_UNSND (attr); |
21973 | ||
21974 | if (bits < sizeof (*value) * 8) | |
21975 | { | |
21976 | l &= ((LONGEST) 1 << bits) - 1; | |
21977 | *value = l; | |
21978 | } | |
21979 | else if (bits == sizeof (*value) * 8) | |
21980 | *value = l; | |
21981 | else | |
21982 | { | |
224c3ddb | 21983 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
98bfdba5 PA |
21984 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
21985 | return bytes; | |
21986 | } | |
21987 | ||
21988 | return NULL; | |
21989 | } | |
21990 | ||
21991 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
21992 | the value does not fit in *VALUE, set *BYTES - either already | |
21993 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
21994 | or, set *BATON, if we translated the constant to a location | |
21995 | expression. */ | |
21996 | ||
21997 | static void | |
ff39bb5e | 21998 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
21999 | const char *name, struct obstack *obstack, |
22000 | struct dwarf2_cu *cu, | |
d521ce57 | 22001 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
22002 | struct dwarf2_locexpr_baton **baton) |
22003 | { | |
518817b3 | 22004 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
98bfdba5 | 22005 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 22006 | struct dwarf_block *blk; |
98bfdba5 PA |
22007 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
22008 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
22009 | ||
22010 | *value = 0; | |
22011 | *bytes = NULL; | |
22012 | *baton = NULL; | |
c906108c SS |
22013 | |
22014 | switch (attr->form) | |
22015 | { | |
22016 | case DW_FORM_addr: | |
336d760d | 22017 | case DW_FORM_addrx: |
3019eac3 | 22018 | case DW_FORM_GNU_addr_index: |
ac56253d | 22019 | { |
ac56253d TT |
22020 | gdb_byte *data; |
22021 | ||
98bfdba5 PA |
22022 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
22023 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 22024 | cu_header->addr_size, |
98bfdba5 | 22025 | TYPE_LENGTH (type)); |
ac56253d TT |
22026 | /* Symbols of this form are reasonably rare, so we just |
22027 | piggyback on the existing location code rather than writing | |
22028 | a new implementation of symbol_computed_ops. */ | |
8d749320 | 22029 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
98bfdba5 PA |
22030 | (*baton)->per_cu = cu->per_cu; |
22031 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 22032 | |
98bfdba5 | 22033 | (*baton)->size = 2 + cu_header->addr_size; |
224c3ddb | 22034 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 22035 | (*baton)->data = data; |
ac56253d TT |
22036 | |
22037 | data[0] = DW_OP_addr; | |
22038 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
22039 | byte_order, DW_ADDR (attr)); | |
22040 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 22041 | } |
c906108c | 22042 | break; |
4ac36638 | 22043 | case DW_FORM_string: |
93b5768b | 22044 | case DW_FORM_strp: |
cf532bd1 | 22045 | case DW_FORM_strx: |
3019eac3 | 22046 | case DW_FORM_GNU_str_index: |
36586728 | 22047 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
22048 | /* DW_STRING is already allocated on the objfile obstack, point |
22049 | directly to it. */ | |
d521ce57 | 22050 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 22051 | break; |
c906108c SS |
22052 | case DW_FORM_block1: |
22053 | case DW_FORM_block2: | |
22054 | case DW_FORM_block4: | |
22055 | case DW_FORM_block: | |
2dc7f7b3 | 22056 | case DW_FORM_exprloc: |
0224619f | 22057 | case DW_FORM_data16: |
c906108c | 22058 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
22059 | if (TYPE_LENGTH (type) != blk->size) |
22060 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
22061 | TYPE_LENGTH (type)); | |
22062 | *bytes = blk->data; | |
c906108c | 22063 | break; |
2df3850c JM |
22064 | |
22065 | /* The DW_AT_const_value attributes are supposed to carry the | |
22066 | symbol's value "represented as it would be on the target | |
22067 | architecture." By the time we get here, it's already been | |
22068 | converted to host endianness, so we just need to sign- or | |
22069 | zero-extend it as appropriate. */ | |
22070 | case DW_FORM_data1: | |
3aef2284 | 22071 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 22072 | break; |
c906108c | 22073 | case DW_FORM_data2: |
3aef2284 | 22074 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 22075 | break; |
c906108c | 22076 | case DW_FORM_data4: |
3aef2284 | 22077 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 22078 | break; |
c906108c | 22079 | case DW_FORM_data8: |
3aef2284 | 22080 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
22081 | break; |
22082 | ||
c906108c | 22083 | case DW_FORM_sdata: |
663c44ac | 22084 | case DW_FORM_implicit_const: |
98bfdba5 | 22085 | *value = DW_SND (attr); |
2df3850c JM |
22086 | break; |
22087 | ||
c906108c | 22088 | case DW_FORM_udata: |
98bfdba5 | 22089 | *value = DW_UNSND (attr); |
c906108c | 22090 | break; |
2df3850c | 22091 | |
c906108c | 22092 | default: |
b98664d3 | 22093 | complaint (_("unsupported const value attribute form: '%s'"), |
4d3c2250 | 22094 | dwarf_form_name (attr->form)); |
98bfdba5 | 22095 | *value = 0; |
c906108c SS |
22096 | break; |
22097 | } | |
22098 | } | |
22099 | ||
2df3850c | 22100 | |
98bfdba5 PA |
22101 | /* Copy constant value from an attribute to a symbol. */ |
22102 | ||
2df3850c | 22103 | static void |
ff39bb5e | 22104 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 22105 | struct dwarf2_cu *cu) |
2df3850c | 22106 | { |
518817b3 | 22107 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
12df843f | 22108 | LONGEST value; |
d521ce57 | 22109 | const gdb_byte *bytes; |
98bfdba5 | 22110 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 22111 | |
98bfdba5 PA |
22112 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
22113 | SYMBOL_PRINT_NAME (sym), | |
22114 | &objfile->objfile_obstack, cu, | |
22115 | &value, &bytes, &baton); | |
2df3850c | 22116 | |
98bfdba5 PA |
22117 | if (baton != NULL) |
22118 | { | |
98bfdba5 | 22119 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 22120 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
22121 | } |
22122 | else if (bytes != NULL) | |
22123 | { | |
22124 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 22125 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
22126 | } |
22127 | else | |
22128 | { | |
22129 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 22130 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 22131 | } |
2df3850c JM |
22132 | } |
22133 | ||
c906108c SS |
22134 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
22135 | ||
22136 | static struct type * | |
e7c27a73 | 22137 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 22138 | { |
c906108c | 22139 | struct attribute *type_attr; |
c906108c | 22140 | |
e142c38c | 22141 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
22142 | if (!type_attr) |
22143 | { | |
518817b3 | 22144 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 22145 | /* A missing DW_AT_type represents a void type. */ |
518817b3 | 22146 | return objfile_type (objfile)->builtin_void; |
c906108c | 22147 | } |
348e048f | 22148 | |
673bfd45 | 22149 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
22150 | } |
22151 | ||
b4ba55a1 JB |
22152 | /* True iff CU's producer generates GNAT Ada auxiliary information |
22153 | that allows to find parallel types through that information instead | |
22154 | of having to do expensive parallel lookups by type name. */ | |
22155 | ||
22156 | static int | |
22157 | need_gnat_info (struct dwarf2_cu *cu) | |
22158 | { | |
de4cb04a JB |
22159 | /* Assume that the Ada compiler was GNAT, which always produces |
22160 | the auxiliary information. */ | |
22161 | return (cu->language == language_ada); | |
b4ba55a1 JB |
22162 | } |
22163 | ||
b4ba55a1 JB |
22164 | /* Return the auxiliary type of the die in question using its |
22165 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
22166 | attribute is not present. */ | |
22167 | ||
22168 | static struct type * | |
22169 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
22170 | { | |
b4ba55a1 | 22171 | struct attribute *type_attr; |
b4ba55a1 JB |
22172 | |
22173 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
22174 | if (!type_attr) | |
22175 | return NULL; | |
22176 | ||
673bfd45 | 22177 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
22178 | } |
22179 | ||
22180 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
22181 | descriptive type accordingly. */ | |
22182 | ||
22183 | static void | |
22184 | set_descriptive_type (struct type *type, struct die_info *die, | |
22185 | struct dwarf2_cu *cu) | |
22186 | { | |
22187 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
22188 | ||
22189 | if (descriptive_type) | |
22190 | { | |
22191 | ALLOCATE_GNAT_AUX_TYPE (type); | |
22192 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
22193 | } | |
22194 | } | |
22195 | ||
c906108c SS |
22196 | /* Return the containing type of the die in question using its |
22197 | DW_AT_containing_type attribute. */ | |
22198 | ||
22199 | static struct type * | |
e7c27a73 | 22200 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 22201 | { |
c906108c | 22202 | struct attribute *type_attr; |
518817b3 | 22203 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 22204 | |
e142c38c | 22205 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
22206 | if (!type_attr) |
22207 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
518817b3 | 22208 | "[in module %s]"), objfile_name (objfile)); |
33ac96f0 | 22209 | |
673bfd45 | 22210 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
22211 | } |
22212 | ||
ac9ec31b DE |
22213 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
22214 | ||
22215 | static struct type * | |
22216 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
22217 | { | |
518817b3 SM |
22218 | struct dwarf2_per_objfile *dwarf2_per_objfile |
22219 | = cu->per_cu->dwarf2_per_objfile; | |
ac9ec31b | 22220 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
528e1572 | 22221 | char *saved; |
ac9ec31b | 22222 | |
528e1572 SM |
22223 | std::string message |
22224 | = string_printf (_("<unknown type in %s, CU %s, DIE %s>"), | |
22225 | objfile_name (objfile), | |
22226 | sect_offset_str (cu->header.sect_off), | |
22227 | sect_offset_str (die->sect_off)); | |
efba19b0 | 22228 | saved = obstack_strdup (&objfile->objfile_obstack, message); |
ac9ec31b | 22229 | |
19f392bc | 22230 | return init_type (objfile, TYPE_CODE_ERROR, 0, saved); |
ac9ec31b DE |
22231 | } |
22232 | ||
673bfd45 | 22233 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
22234 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
22235 | DW_AT_containing_type. | |
673bfd45 DE |
22236 | If there is no type substitute an error marker. */ |
22237 | ||
c906108c | 22238 | static struct type * |
ff39bb5e | 22239 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 22240 | struct dwarf2_cu *cu) |
c906108c | 22241 | { |
518817b3 SM |
22242 | struct dwarf2_per_objfile *dwarf2_per_objfile |
22243 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 22244 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
f792889a DJ |
22245 | struct type *this_type; |
22246 | ||
ac9ec31b DE |
22247 | gdb_assert (attr->name == DW_AT_type |
22248 | || attr->name == DW_AT_GNAT_descriptive_type | |
22249 | || attr->name == DW_AT_containing_type); | |
22250 | ||
673bfd45 DE |
22251 | /* First see if we have it cached. */ |
22252 | ||
36586728 TT |
22253 | if (attr->form == DW_FORM_GNU_ref_alt) |
22254 | { | |
22255 | struct dwarf2_per_cu_data *per_cu; | |
9c541725 | 22256 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
36586728 | 22257 | |
ed2dc618 SM |
22258 | per_cu = dwarf2_find_containing_comp_unit (sect_off, 1, |
22259 | dwarf2_per_objfile); | |
9c541725 | 22260 | this_type = get_die_type_at_offset (sect_off, per_cu); |
36586728 | 22261 | } |
7771576e | 22262 | else if (attr_form_is_ref (attr)) |
673bfd45 | 22263 | { |
9c541725 | 22264 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
673bfd45 | 22265 | |
9c541725 | 22266 | this_type = get_die_type_at_offset (sect_off, cu->per_cu); |
673bfd45 | 22267 | } |
55f1336d | 22268 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 22269 | { |
ac9ec31b | 22270 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 22271 | |
ac9ec31b | 22272 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
22273 | } |
22274 | else | |
22275 | { | |
b98664d3 | 22276 | complaint (_("Dwarf Error: Bad type attribute %s in DIE" |
9d8780f0 SM |
22277 | " at %s [in module %s]"), |
22278 | dwarf_attr_name (attr->name), sect_offset_str (die->sect_off), | |
4262abfb | 22279 | objfile_name (objfile)); |
ac9ec31b | 22280 | return build_error_marker_type (cu, die); |
673bfd45 DE |
22281 | } |
22282 | ||
22283 | /* If not cached we need to read it in. */ | |
22284 | ||
22285 | if (this_type == NULL) | |
22286 | { | |
ac9ec31b | 22287 | struct die_info *type_die = NULL; |
673bfd45 DE |
22288 | struct dwarf2_cu *type_cu = cu; |
22289 | ||
7771576e | 22290 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
22291 | type_die = follow_die_ref (die, attr, &type_cu); |
22292 | if (type_die == NULL) | |
22293 | return build_error_marker_type (cu, die); | |
22294 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
22295 | from an inter-CU reference and the type's CU got expanded before |
22296 | ours. */ | |
ac9ec31b | 22297 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
22298 | } |
22299 | ||
22300 | /* If we still don't have a type use an error marker. */ | |
22301 | ||
22302 | if (this_type == NULL) | |
ac9ec31b | 22303 | return build_error_marker_type (cu, die); |
673bfd45 | 22304 | |
f792889a | 22305 | return this_type; |
c906108c SS |
22306 | } |
22307 | ||
673bfd45 DE |
22308 | /* Return the type in DIE, CU. |
22309 | Returns NULL for invalid types. | |
22310 | ||
02142a6c | 22311 | This first does a lookup in die_type_hash, |
673bfd45 DE |
22312 | and only reads the die in if necessary. |
22313 | ||
22314 | NOTE: This can be called when reading in partial or full symbols. */ | |
22315 | ||
f792889a | 22316 | static struct type * |
e7c27a73 | 22317 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 22318 | { |
f792889a DJ |
22319 | struct type *this_type; |
22320 | ||
22321 | this_type = get_die_type (die, cu); | |
22322 | if (this_type) | |
22323 | return this_type; | |
22324 | ||
673bfd45 DE |
22325 | return read_type_die_1 (die, cu); |
22326 | } | |
22327 | ||
22328 | /* Read the type in DIE, CU. | |
22329 | Returns NULL for invalid types. */ | |
22330 | ||
22331 | static struct type * | |
22332 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
22333 | { | |
22334 | struct type *this_type = NULL; | |
22335 | ||
c906108c SS |
22336 | switch (die->tag) |
22337 | { | |
22338 | case DW_TAG_class_type: | |
680b30c7 | 22339 | case DW_TAG_interface_type: |
c906108c SS |
22340 | case DW_TAG_structure_type: |
22341 | case DW_TAG_union_type: | |
f792889a | 22342 | this_type = read_structure_type (die, cu); |
c906108c SS |
22343 | break; |
22344 | case DW_TAG_enumeration_type: | |
f792889a | 22345 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
22346 | break; |
22347 | case DW_TAG_subprogram: | |
22348 | case DW_TAG_subroutine_type: | |
edb3359d | 22349 | case DW_TAG_inlined_subroutine: |
f792889a | 22350 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
22351 | break; |
22352 | case DW_TAG_array_type: | |
f792889a | 22353 | this_type = read_array_type (die, cu); |
c906108c | 22354 | break; |
72019c9c | 22355 | case DW_TAG_set_type: |
f792889a | 22356 | this_type = read_set_type (die, cu); |
72019c9c | 22357 | break; |
c906108c | 22358 | case DW_TAG_pointer_type: |
f792889a | 22359 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
22360 | break; |
22361 | case DW_TAG_ptr_to_member_type: | |
f792889a | 22362 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
22363 | break; |
22364 | case DW_TAG_reference_type: | |
4297a3f0 AV |
22365 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_REF); |
22366 | break; | |
22367 | case DW_TAG_rvalue_reference_type: | |
22368 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_RVALUE_REF); | |
c906108c SS |
22369 | break; |
22370 | case DW_TAG_const_type: | |
f792889a | 22371 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
22372 | break; |
22373 | case DW_TAG_volatile_type: | |
f792889a | 22374 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 22375 | break; |
06d66ee9 TT |
22376 | case DW_TAG_restrict_type: |
22377 | this_type = read_tag_restrict_type (die, cu); | |
22378 | break; | |
c906108c | 22379 | case DW_TAG_string_type: |
f792889a | 22380 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
22381 | break; |
22382 | case DW_TAG_typedef: | |
f792889a | 22383 | this_type = read_typedef (die, cu); |
c906108c | 22384 | break; |
a02abb62 | 22385 | case DW_TAG_subrange_type: |
f792889a | 22386 | this_type = read_subrange_type (die, cu); |
a02abb62 | 22387 | break; |
c906108c | 22388 | case DW_TAG_base_type: |
f792889a | 22389 | this_type = read_base_type (die, cu); |
c906108c | 22390 | break; |
81a17f79 | 22391 | case DW_TAG_unspecified_type: |
f792889a | 22392 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 22393 | break; |
0114d602 DJ |
22394 | case DW_TAG_namespace: |
22395 | this_type = read_namespace_type (die, cu); | |
22396 | break; | |
f55ee35c JK |
22397 | case DW_TAG_module: |
22398 | this_type = read_module_type (die, cu); | |
22399 | break; | |
a2c2acaf MW |
22400 | case DW_TAG_atomic_type: |
22401 | this_type = read_tag_atomic_type (die, cu); | |
22402 | break; | |
c906108c | 22403 | default: |
b98664d3 | 22404 | complaint (_("unexpected tag in read_type_die: '%s'"), |
4d3c2250 | 22405 | dwarf_tag_name (die->tag)); |
c906108c SS |
22406 | break; |
22407 | } | |
63d06c5c | 22408 | |
f792889a | 22409 | return this_type; |
63d06c5c DC |
22410 | } |
22411 | ||
abc72ce4 DE |
22412 | /* See if we can figure out if the class lives in a namespace. We do |
22413 | this by looking for a member function; its demangled name will | |
22414 | contain namespace info, if there is any. | |
22415 | Return the computed name or NULL. | |
22416 | Space for the result is allocated on the objfile's obstack. | |
22417 | This is the full-die version of guess_partial_die_structure_name. | |
22418 | In this case we know DIE has no useful parent. */ | |
22419 | ||
22420 | static char * | |
22421 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) | |
22422 | { | |
22423 | struct die_info *spec_die; | |
22424 | struct dwarf2_cu *spec_cu; | |
22425 | struct die_info *child; | |
518817b3 | 22426 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
abc72ce4 DE |
22427 | |
22428 | spec_cu = cu; | |
22429 | spec_die = die_specification (die, &spec_cu); | |
22430 | if (spec_die != NULL) | |
22431 | { | |
22432 | die = spec_die; | |
22433 | cu = spec_cu; | |
22434 | } | |
22435 | ||
22436 | for (child = die->child; | |
22437 | child != NULL; | |
22438 | child = child->sibling) | |
22439 | { | |
22440 | if (child->tag == DW_TAG_subprogram) | |
22441 | { | |
73b9be8b | 22442 | const char *linkage_name = dw2_linkage_name (child, cu); |
abc72ce4 | 22443 | |
7d45c7c3 | 22444 | if (linkage_name != NULL) |
abc72ce4 DE |
22445 | { |
22446 | char *actual_name | |
22447 | = language_class_name_from_physname (cu->language_defn, | |
7d45c7c3 | 22448 | linkage_name); |
abc72ce4 DE |
22449 | char *name = NULL; |
22450 | ||
22451 | if (actual_name != NULL) | |
22452 | { | |
15d034d0 | 22453 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
22454 | |
22455 | if (die_name != NULL | |
22456 | && strcmp (die_name, actual_name) != 0) | |
22457 | { | |
22458 | /* Strip off the class name from the full name. | |
22459 | We want the prefix. */ | |
22460 | int die_name_len = strlen (die_name); | |
22461 | int actual_name_len = strlen (actual_name); | |
22462 | ||
22463 | /* Test for '::' as a sanity check. */ | |
22464 | if (actual_name_len > die_name_len + 2 | |
3e43a32a MS |
22465 | && actual_name[actual_name_len |
22466 | - die_name_len - 1] == ':') | |
0cf9feb9 | 22467 | name = obstack_strndup ( |
e3b94546 | 22468 | &objfile->per_bfd->storage_obstack, |
224c3ddb | 22469 | actual_name, actual_name_len - die_name_len - 2); |
abc72ce4 DE |
22470 | } |
22471 | } | |
22472 | xfree (actual_name); | |
22473 | return name; | |
22474 | } | |
22475 | } | |
22476 | } | |
22477 | ||
22478 | return NULL; | |
22479 | } | |
22480 | ||
96408a79 SA |
22481 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
22482 | prefix part in such case. See | |
22483 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
22484 | ||
a121b7c1 | 22485 | static const char * |
96408a79 SA |
22486 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) |
22487 | { | |
22488 | struct attribute *attr; | |
e6a959d6 | 22489 | const char *base; |
96408a79 SA |
22490 | |
22491 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
22492 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
22493 | return NULL; | |
22494 | ||
7d45c7c3 | 22495 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
96408a79 SA |
22496 | return NULL; |
22497 | ||
73b9be8b | 22498 | attr = dw2_linkage_name_attr (die, cu); |
96408a79 SA |
22499 | if (attr == NULL || DW_STRING (attr) == NULL) |
22500 | return NULL; | |
22501 | ||
22502 | /* dwarf2_name had to be already called. */ | |
22503 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
22504 | ||
22505 | /* Strip the base name, keep any leading namespaces/classes. */ | |
22506 | base = strrchr (DW_STRING (attr), ':'); | |
22507 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
22508 | return ""; | |
22509 | ||
518817b3 | 22510 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0cf9feb9 TT |
22511 | return obstack_strndup (&objfile->per_bfd->storage_obstack, |
22512 | DW_STRING (attr), | |
22513 | &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
22514 | } |
22515 | ||
fdde2d81 | 22516 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 22517 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 22518 | |
0114d602 DJ |
22519 | For example, if we're within the method foo() in the following |
22520 | code: | |
22521 | ||
22522 | namespace N { | |
22523 | class C { | |
22524 | void foo () { | |
22525 | } | |
22526 | }; | |
22527 | } | |
22528 | ||
22529 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 22530 | |
0d5cff50 | 22531 | static const char * |
e142c38c | 22532 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 22533 | { |
518817b3 SM |
22534 | struct dwarf2_per_objfile *dwarf2_per_objfile |
22535 | = cu->per_cu->dwarf2_per_objfile; | |
0114d602 DJ |
22536 | struct die_info *parent, *spec_die; |
22537 | struct dwarf2_cu *spec_cu; | |
22538 | struct type *parent_type; | |
a121b7c1 | 22539 | const char *retval; |
63d06c5c | 22540 | |
9c37b5ae | 22541 | if (cu->language != language_cplus |
c44af4eb TT |
22542 | && cu->language != language_fortran && cu->language != language_d |
22543 | && cu->language != language_rust) | |
0114d602 DJ |
22544 | return ""; |
22545 | ||
96408a79 SA |
22546 | retval = anonymous_struct_prefix (die, cu); |
22547 | if (retval) | |
22548 | return retval; | |
22549 | ||
0114d602 DJ |
22550 | /* We have to be careful in the presence of DW_AT_specification. |
22551 | For example, with GCC 3.4, given the code | |
22552 | ||
22553 | namespace N { | |
22554 | void foo() { | |
22555 | // Definition of N::foo. | |
22556 | } | |
22557 | } | |
22558 | ||
22559 | then we'll have a tree of DIEs like this: | |
22560 | ||
22561 | 1: DW_TAG_compile_unit | |
22562 | 2: DW_TAG_namespace // N | |
22563 | 3: DW_TAG_subprogram // declaration of N::foo | |
22564 | 4: DW_TAG_subprogram // definition of N::foo | |
22565 | DW_AT_specification // refers to die #3 | |
22566 | ||
22567 | Thus, when processing die #4, we have to pretend that we're in | |
22568 | the context of its DW_AT_specification, namely the contex of die | |
22569 | #3. */ | |
22570 | spec_cu = cu; | |
22571 | spec_die = die_specification (die, &spec_cu); | |
22572 | if (spec_die == NULL) | |
22573 | parent = die->parent; | |
22574 | else | |
63d06c5c | 22575 | { |
0114d602 DJ |
22576 | parent = spec_die->parent; |
22577 | cu = spec_cu; | |
63d06c5c | 22578 | } |
0114d602 DJ |
22579 | |
22580 | if (parent == NULL) | |
22581 | return ""; | |
98bfdba5 PA |
22582 | else if (parent->building_fullname) |
22583 | { | |
22584 | const char *name; | |
22585 | const char *parent_name; | |
22586 | ||
22587 | /* It has been seen on RealView 2.2 built binaries, | |
22588 | DW_TAG_template_type_param types actually _defined_ as | |
22589 | children of the parent class: | |
22590 | ||
22591 | enum E {}; | |
22592 | template class <class Enum> Class{}; | |
22593 | Class<enum E> class_e; | |
22594 | ||
22595 | 1: DW_TAG_class_type (Class) | |
22596 | 2: DW_TAG_enumeration_type (E) | |
22597 | 3: DW_TAG_enumerator (enum1:0) | |
22598 | 3: DW_TAG_enumerator (enum2:1) | |
22599 | ... | |
22600 | 2: DW_TAG_template_type_param | |
22601 | DW_AT_type DW_FORM_ref_udata (E) | |
22602 | ||
22603 | Besides being broken debug info, it can put GDB into an | |
22604 | infinite loop. Consider: | |
22605 | ||
22606 | When we're building the full name for Class<E>, we'll start | |
22607 | at Class, and go look over its template type parameters, | |
22608 | finding E. We'll then try to build the full name of E, and | |
22609 | reach here. We're now trying to build the full name of E, | |
22610 | and look over the parent DIE for containing scope. In the | |
22611 | broken case, if we followed the parent DIE of E, we'd again | |
22612 | find Class, and once again go look at its template type | |
22613 | arguments, etc., etc. Simply don't consider such parent die | |
22614 | as source-level parent of this die (it can't be, the language | |
22615 | doesn't allow it), and break the loop here. */ | |
22616 | name = dwarf2_name (die, cu); | |
22617 | parent_name = dwarf2_name (parent, cu); | |
b98664d3 | 22618 | complaint (_("template param type '%s' defined within parent '%s'"), |
98bfdba5 PA |
22619 | name ? name : "<unknown>", |
22620 | parent_name ? parent_name : "<unknown>"); | |
22621 | return ""; | |
22622 | } | |
63d06c5c | 22623 | else |
0114d602 DJ |
22624 | switch (parent->tag) |
22625 | { | |
63d06c5c | 22626 | case DW_TAG_namespace: |
0114d602 | 22627 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
22628 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
22629 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
22630 | Work around this problem here. */ | |
22631 | if (cu->language == language_cplus | |
e86ca25f | 22632 | && strcmp (TYPE_NAME (parent_type), "::") == 0) |
acebe513 | 22633 | return ""; |
0114d602 | 22634 | /* We give a name to even anonymous namespaces. */ |
e86ca25f | 22635 | return TYPE_NAME (parent_type); |
63d06c5c | 22636 | case DW_TAG_class_type: |
680b30c7 | 22637 | case DW_TAG_interface_type: |
63d06c5c | 22638 | case DW_TAG_structure_type: |
0114d602 | 22639 | case DW_TAG_union_type: |
f55ee35c | 22640 | case DW_TAG_module: |
0114d602 | 22641 | parent_type = read_type_die (parent, cu); |
e86ca25f TT |
22642 | if (TYPE_NAME (parent_type) != NULL) |
22643 | return TYPE_NAME (parent_type); | |
0114d602 DJ |
22644 | else |
22645 | /* An anonymous structure is only allowed non-static data | |
22646 | members; no typedefs, no member functions, et cetera. | |
22647 | So it does not need a prefix. */ | |
22648 | return ""; | |
abc72ce4 | 22649 | case DW_TAG_compile_unit: |
95554aad | 22650 | case DW_TAG_partial_unit: |
abc72ce4 DE |
22651 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
22652 | if (cu->language == language_cplus | |
fd5866f6 | 22653 | && !dwarf2_per_objfile->types.empty () |
abc72ce4 DE |
22654 | && die->child != NULL |
22655 | && (die->tag == DW_TAG_class_type | |
22656 | || die->tag == DW_TAG_structure_type | |
22657 | || die->tag == DW_TAG_union_type)) | |
22658 | { | |
22659 | char *name = guess_full_die_structure_name (die, cu); | |
22660 | if (name != NULL) | |
22661 | return name; | |
22662 | } | |
22663 | return ""; | |
0a4b0913 AB |
22664 | case DW_TAG_subprogram: |
22665 | /* Nested subroutines in Fortran get a prefix with the name | |
22666 | of the parent's subroutine. */ | |
22667 | if (cu->language == language_fortran) | |
22668 | { | |
22669 | if ((die->tag == DW_TAG_subprogram) | |
22670 | && (dwarf2_name (parent, cu) != NULL)) | |
22671 | return dwarf2_name (parent, cu); | |
22672 | } | |
22673 | return determine_prefix (parent, cu); | |
3d567982 TT |
22674 | case DW_TAG_enumeration_type: |
22675 | parent_type = read_type_die (parent, cu); | |
22676 | if (TYPE_DECLARED_CLASS (parent_type)) | |
22677 | { | |
e86ca25f TT |
22678 | if (TYPE_NAME (parent_type) != NULL) |
22679 | return TYPE_NAME (parent_type); | |
3d567982 TT |
22680 | return ""; |
22681 | } | |
22682 | /* Fall through. */ | |
63d06c5c | 22683 | default: |
8176b9b8 | 22684 | return determine_prefix (parent, cu); |
63d06c5c | 22685 | } |
63d06c5c DC |
22686 | } |
22687 | ||
3e43a32a MS |
22688 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
22689 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
22690 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
22691 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
22692 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 22693 | |
f55ee35c | 22694 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
22695 | |
22696 | static char * | |
f55ee35c JK |
22697 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
22698 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 22699 | { |
f55ee35c | 22700 | const char *lead = ""; |
5c315b68 | 22701 | const char *sep; |
63d06c5c | 22702 | |
3e43a32a MS |
22703 | if (suffix == NULL || suffix[0] == '\0' |
22704 | || prefix == NULL || prefix[0] == '\0') | |
987504bb | 22705 | sep = ""; |
45280282 IB |
22706 | else if (cu->language == language_d) |
22707 | { | |
22708 | /* For D, the 'main' function could be defined in any module, but it | |
22709 | should never be prefixed. */ | |
22710 | if (strcmp (suffix, "D main") == 0) | |
22711 | { | |
22712 | prefix = ""; | |
22713 | sep = ""; | |
22714 | } | |
22715 | else | |
22716 | sep = "."; | |
22717 | } | |
f55ee35c JK |
22718 | else if (cu->language == language_fortran && physname) |
22719 | { | |
22720 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
22721 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
22722 | ||
22723 | lead = "__"; | |
22724 | sep = "_MOD_"; | |
22725 | } | |
987504bb JJ |
22726 | else |
22727 | sep = "::"; | |
63d06c5c | 22728 | |
6dd47d34 DE |
22729 | if (prefix == NULL) |
22730 | prefix = ""; | |
22731 | if (suffix == NULL) | |
22732 | suffix = ""; | |
22733 | ||
987504bb JJ |
22734 | if (obs == NULL) |
22735 | { | |
3e43a32a | 22736 | char *retval |
224c3ddb SM |
22737 | = ((char *) |
22738 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); | |
9a619af0 | 22739 | |
f55ee35c JK |
22740 | strcpy (retval, lead); |
22741 | strcat (retval, prefix); | |
6dd47d34 DE |
22742 | strcat (retval, sep); |
22743 | strcat (retval, suffix); | |
63d06c5c DC |
22744 | return retval; |
22745 | } | |
987504bb JJ |
22746 | else |
22747 | { | |
22748 | /* We have an obstack. */ | |
f55ee35c | 22749 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 22750 | } |
63d06c5c DC |
22751 | } |
22752 | ||
c906108c SS |
22753 | /* Return sibling of die, NULL if no sibling. */ |
22754 | ||
f9aca02d | 22755 | static struct die_info * |
fba45db2 | 22756 | sibling_die (struct die_info *die) |
c906108c | 22757 | { |
639d11d3 | 22758 | return die->sibling; |
c906108c SS |
22759 | } |
22760 | ||
71c25dea TT |
22761 | /* Get name of a die, return NULL if not found. */ |
22762 | ||
15d034d0 TT |
22763 | static const char * |
22764 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
71c25dea TT |
22765 | struct obstack *obstack) |
22766 | { | |
22767 | if (name && cu->language == language_cplus) | |
22768 | { | |
2f408ecb | 22769 | std::string canon_name = cp_canonicalize_string (name); |
71c25dea | 22770 | |
2f408ecb | 22771 | if (!canon_name.empty ()) |
71c25dea | 22772 | { |
2f408ecb | 22773 | if (canon_name != name) |
efba19b0 | 22774 | name = obstack_strdup (obstack, canon_name); |
71c25dea TT |
22775 | } |
22776 | } | |
22777 | ||
22778 | return name; | |
c906108c SS |
22779 | } |
22780 | ||
96553a0c DE |
22781 | /* Get name of a die, return NULL if not found. |
22782 | Anonymous namespaces are converted to their magic string. */ | |
9219021c | 22783 | |
15d034d0 | 22784 | static const char * |
e142c38c | 22785 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
22786 | { |
22787 | struct attribute *attr; | |
518817b3 | 22788 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
9219021c | 22789 | |
e142c38c | 22790 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 | 22791 | if ((!attr || !DW_STRING (attr)) |
96553a0c | 22792 | && die->tag != DW_TAG_namespace |
53832f31 TT |
22793 | && die->tag != DW_TAG_class_type |
22794 | && die->tag != DW_TAG_interface_type | |
22795 | && die->tag != DW_TAG_structure_type | |
22796 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
22797 | return NULL; |
22798 | ||
22799 | switch (die->tag) | |
22800 | { | |
22801 | case DW_TAG_compile_unit: | |
95554aad | 22802 | case DW_TAG_partial_unit: |
71c25dea TT |
22803 | /* Compilation units have a DW_AT_name that is a filename, not |
22804 | a source language identifier. */ | |
22805 | case DW_TAG_enumeration_type: | |
22806 | case DW_TAG_enumerator: | |
22807 | /* These tags always have simple identifiers already; no need | |
22808 | to canonicalize them. */ | |
22809 | return DW_STRING (attr); | |
907af001 | 22810 | |
96553a0c DE |
22811 | case DW_TAG_namespace: |
22812 | if (attr != NULL && DW_STRING (attr) != NULL) | |
22813 | return DW_STRING (attr); | |
22814 | return CP_ANONYMOUS_NAMESPACE_STR; | |
22815 | ||
907af001 UW |
22816 | case DW_TAG_class_type: |
22817 | case DW_TAG_interface_type: | |
22818 | case DW_TAG_structure_type: | |
22819 | case DW_TAG_union_type: | |
22820 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
22821 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
22822 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
22823 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 | 22824 | if (attr && DW_STRING (attr) |
61012eef GB |
22825 | && (startswith (DW_STRING (attr), "._") |
22826 | || startswith (DW_STRING (attr), "<anonymous"))) | |
907af001 | 22827 | return NULL; |
53832f31 TT |
22828 | |
22829 | /* GCC might emit a nameless typedef that has a linkage name. See | |
22830 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
22831 | if (!attr || DW_STRING (attr) == NULL) | |
22832 | { | |
df5c6c50 | 22833 | char *demangled = NULL; |
53832f31 | 22834 | |
73b9be8b | 22835 | attr = dw2_linkage_name_attr (die, cu); |
53832f31 TT |
22836 | if (attr == NULL || DW_STRING (attr) == NULL) |
22837 | return NULL; | |
22838 | ||
df5c6c50 JK |
22839 | /* Avoid demangling DW_STRING (attr) the second time on a second |
22840 | call for the same DIE. */ | |
22841 | if (!DW_STRING_IS_CANONICAL (attr)) | |
8de20a37 | 22842 | demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES); |
53832f31 TT |
22843 | |
22844 | if (demangled) | |
22845 | { | |
e6a959d6 | 22846 | const char *base; |
96408a79 | 22847 | |
53832f31 | 22848 | /* FIXME: we already did this for the partial symbol... */ |
34a68019 | 22849 | DW_STRING (attr) |
021887d8 TT |
22850 | = obstack_strdup (&objfile->per_bfd->storage_obstack, |
22851 | demangled); | |
53832f31 TT |
22852 | DW_STRING_IS_CANONICAL (attr) = 1; |
22853 | xfree (demangled); | |
96408a79 SA |
22854 | |
22855 | /* Strip any leading namespaces/classes, keep only the base name. | |
22856 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
22857 | base = strrchr (DW_STRING (attr), ':'); | |
22858 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
22859 | return &base[1]; | |
22860 | else | |
22861 | return DW_STRING (attr); | |
53832f31 TT |
22862 | } |
22863 | } | |
907af001 UW |
22864 | break; |
22865 | ||
71c25dea | 22866 | default: |
907af001 UW |
22867 | break; |
22868 | } | |
22869 | ||
22870 | if (!DW_STRING_IS_CANONICAL (attr)) | |
22871 | { | |
22872 | DW_STRING (attr) | |
22873 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
e3b94546 | 22874 | &objfile->per_bfd->storage_obstack); |
907af001 | 22875 | DW_STRING_IS_CANONICAL (attr) = 1; |
71c25dea | 22876 | } |
907af001 | 22877 | return DW_STRING (attr); |
9219021c DC |
22878 | } |
22879 | ||
22880 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
22881 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
22882 | containing the return value on output. */ | |
9219021c DC |
22883 | |
22884 | static struct die_info * | |
f2f0e013 | 22885 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
22886 | { |
22887 | struct attribute *attr; | |
9219021c | 22888 | |
f2f0e013 | 22889 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
22890 | if (attr == NULL) |
22891 | return NULL; | |
22892 | ||
f2f0e013 | 22893 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
22894 | } |
22895 | ||
fa9c3fa0 TT |
22896 | /* A convenience function that returns an "unknown" DWARF name, |
22897 | including the value of V. STR is the name of the entity being | |
22898 | printed, e.g., "TAG". */ | |
22899 | ||
22900 | static const char * | |
22901 | dwarf_unknown (const char *str, unsigned v) | |
22902 | { | |
22903 | char *cell = get_print_cell (); | |
22904 | xsnprintf (cell, PRINT_CELL_SIZE, "DW_%s_<unknown: %u>", str, v); | |
22905 | return cell; | |
22906 | } | |
22907 | ||
c906108c SS |
22908 | /* Convert a DIE tag into its string name. */ |
22909 | ||
f39c6ffd | 22910 | static const char * |
aa1ee363 | 22911 | dwarf_tag_name (unsigned tag) |
c906108c | 22912 | { |
f39c6ffd TT |
22913 | const char *name = get_DW_TAG_name (tag); |
22914 | ||
22915 | if (name == NULL) | |
fa9c3fa0 | 22916 | return dwarf_unknown ("TAG", tag); |
f39c6ffd TT |
22917 | |
22918 | return name; | |
c906108c SS |
22919 | } |
22920 | ||
22921 | /* Convert a DWARF attribute code into its string name. */ | |
22922 | ||
f39c6ffd | 22923 | static const char * |
aa1ee363 | 22924 | dwarf_attr_name (unsigned attr) |
c906108c | 22925 | { |
f39c6ffd TT |
22926 | const char *name; |
22927 | ||
c764a876 | 22928 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
22929 | if (attr == DW_AT_MIPS_fde) |
22930 | return "DW_AT_MIPS_fde"; | |
22931 | #else | |
22932 | if (attr == DW_AT_HP_block_index) | |
22933 | return "DW_AT_HP_block_index"; | |
c764a876 | 22934 | #endif |
f39c6ffd TT |
22935 | |
22936 | name = get_DW_AT_name (attr); | |
22937 | ||
22938 | if (name == NULL) | |
fa9c3fa0 | 22939 | return dwarf_unknown ("AT", attr); |
f39c6ffd TT |
22940 | |
22941 | return name; | |
c906108c SS |
22942 | } |
22943 | ||
a084a2a6 AT |
22944 | /* Convert a unit type to corresponding DW_UT name. */ |
22945 | ||
22946 | static const char * | |
22947 | dwarf_unit_type_name (int unit_type) { | |
22948 | switch (unit_type) | |
22949 | { | |
22950 | case 0x01: | |
22951 | return "DW_UT_compile (0x01)"; | |
22952 | case 0x02: | |
22953 | return "DW_UT_type (0x02)"; | |
22954 | case 0x03: | |
22955 | return "DW_UT_partial (0x03)"; | |
22956 | case 0x04: | |
22957 | return "DW_UT_skeleton (0x04)"; | |
22958 | case 0x05: | |
22959 | return "DW_UT_split_compile (0x05)"; | |
22960 | case 0x06: | |
22961 | return "DW_UT_split_type (0x06)"; | |
22962 | case 0x80: | |
22963 | return "DW_UT_lo_user (0x80)"; | |
22964 | case 0xff: | |
22965 | return "DW_UT_hi_user (0xff)"; | |
22966 | default: | |
22967 | return nullptr; | |
22968 | } | |
22969 | } | |
22970 | ||
c906108c SS |
22971 | /* Convert a DWARF value form code into its string name. */ |
22972 | ||
f39c6ffd | 22973 | static const char * |
aa1ee363 | 22974 | dwarf_form_name (unsigned form) |
c906108c | 22975 | { |
f39c6ffd TT |
22976 | const char *name = get_DW_FORM_name (form); |
22977 | ||
22978 | if (name == NULL) | |
fa9c3fa0 | 22979 | return dwarf_unknown ("FORM", form); |
f39c6ffd TT |
22980 | |
22981 | return name; | |
c906108c SS |
22982 | } |
22983 | ||
a121b7c1 | 22984 | static const char * |
fba45db2 | 22985 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
22986 | { |
22987 | if (mybool) | |
22988 | return "TRUE"; | |
22989 | else | |
22990 | return "FALSE"; | |
22991 | } | |
22992 | ||
22993 | /* Convert a DWARF type code into its string name. */ | |
22994 | ||
f39c6ffd | 22995 | static const char * |
aa1ee363 | 22996 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 22997 | { |
f39c6ffd | 22998 | const char *name = get_DW_ATE_name (enc); |
c906108c | 22999 | |
f39c6ffd | 23000 | if (name == NULL) |
fa9c3fa0 | 23001 | return dwarf_unknown ("ATE", enc); |
c906108c | 23002 | |
f39c6ffd | 23003 | return name; |
c906108c | 23004 | } |
c906108c | 23005 | |
f9aca02d | 23006 | static void |
d97bc12b | 23007 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
23008 | { |
23009 | unsigned int i; | |
23010 | ||
d97bc12b | 23011 | print_spaces (indent, f); |
9d8780f0 | 23012 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset %s)\n", |
9c541725 | 23013 | dwarf_tag_name (die->tag), die->abbrev, |
9d8780f0 | 23014 | sect_offset_str (die->sect_off)); |
d97bc12b DE |
23015 | |
23016 | if (die->parent != NULL) | |
23017 | { | |
23018 | print_spaces (indent, f); | |
9d8780f0 SM |
23019 | fprintf_unfiltered (f, " parent at offset: %s\n", |
23020 | sect_offset_str (die->parent->sect_off)); | |
d97bc12b DE |
23021 | } |
23022 | ||
23023 | print_spaces (indent, f); | |
23024 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 23025 | dwarf_bool_name (die->child != NULL)); |
c906108c | 23026 | |
d97bc12b DE |
23027 | print_spaces (indent, f); |
23028 | fprintf_unfiltered (f, " attributes:\n"); | |
23029 | ||
c906108c SS |
23030 | for (i = 0; i < die->num_attrs; ++i) |
23031 | { | |
d97bc12b DE |
23032 | print_spaces (indent, f); |
23033 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
23034 | dwarf_attr_name (die->attrs[i].name), |
23035 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 23036 | |
c906108c SS |
23037 | switch (die->attrs[i].form) |
23038 | { | |
c906108c | 23039 | case DW_FORM_addr: |
336d760d | 23040 | case DW_FORM_addrx: |
3019eac3 | 23041 | case DW_FORM_GNU_addr_index: |
d97bc12b | 23042 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 23043 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
23044 | break; |
23045 | case DW_FORM_block2: | |
23046 | case DW_FORM_block4: | |
23047 | case DW_FORM_block: | |
23048 | case DW_FORM_block1: | |
56eb65bd SP |
23049 | fprintf_unfiltered (f, "block: size %s", |
23050 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 23051 | break; |
2dc7f7b3 | 23052 | case DW_FORM_exprloc: |
56eb65bd SP |
23053 | fprintf_unfiltered (f, "expression: size %s", |
23054 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 23055 | break; |
0224619f JK |
23056 | case DW_FORM_data16: |
23057 | fprintf_unfiltered (f, "constant of 16 bytes"); | |
23058 | break; | |
4568ecf9 DE |
23059 | case DW_FORM_ref_addr: |
23060 | fprintf_unfiltered (f, "ref address: "); | |
23061 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
23062 | break; | |
36586728 TT |
23063 | case DW_FORM_GNU_ref_alt: |
23064 | fprintf_unfiltered (f, "alt ref address: "); | |
23065 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
23066 | break; | |
10b3939b DJ |
23067 | case DW_FORM_ref1: |
23068 | case DW_FORM_ref2: | |
23069 | case DW_FORM_ref4: | |
4568ecf9 DE |
23070 | case DW_FORM_ref8: |
23071 | case DW_FORM_ref_udata: | |
d97bc12b | 23072 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 23073 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 23074 | break; |
c906108c SS |
23075 | case DW_FORM_data1: |
23076 | case DW_FORM_data2: | |
23077 | case DW_FORM_data4: | |
ce5d95e1 | 23078 | case DW_FORM_data8: |
c906108c SS |
23079 | case DW_FORM_udata: |
23080 | case DW_FORM_sdata: | |
43bbcdc2 PH |
23081 | fprintf_unfiltered (f, "constant: %s", |
23082 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 23083 | break; |
2dc7f7b3 TT |
23084 | case DW_FORM_sec_offset: |
23085 | fprintf_unfiltered (f, "section offset: %s", | |
23086 | pulongest (DW_UNSND (&die->attrs[i]))); | |
23087 | break; | |
55f1336d | 23088 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
23089 | fprintf_unfiltered (f, "signature: %s", |
23090 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 23091 | break; |
c906108c | 23092 | case DW_FORM_string: |
4bdf3d34 | 23093 | case DW_FORM_strp: |
43988095 | 23094 | case DW_FORM_line_strp: |
cf532bd1 | 23095 | case DW_FORM_strx: |
3019eac3 | 23096 | case DW_FORM_GNU_str_index: |
36586728 | 23097 | case DW_FORM_GNU_strp_alt: |
8285870a | 23098 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 23099 | DW_STRING (&die->attrs[i]) |
8285870a JK |
23100 | ? DW_STRING (&die->attrs[i]) : "", |
23101 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
23102 | break; |
23103 | case DW_FORM_flag: | |
23104 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 23105 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 23106 | else |
d97bc12b | 23107 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 23108 | break; |
2dc7f7b3 TT |
23109 | case DW_FORM_flag_present: |
23110 | fprintf_unfiltered (f, "flag: TRUE"); | |
23111 | break; | |
a8329558 | 23112 | case DW_FORM_indirect: |
0963b4bd MS |
23113 | /* The reader will have reduced the indirect form to |
23114 | the "base form" so this form should not occur. */ | |
5f48f8f3 | 23115 | fprintf_unfiltered (f, |
3e43a32a | 23116 | "unexpected attribute form: DW_FORM_indirect"); |
a8329558 | 23117 | break; |
663c44ac JK |
23118 | case DW_FORM_implicit_const: |
23119 | fprintf_unfiltered (f, "constant: %s", | |
23120 | plongest (DW_SND (&die->attrs[i]))); | |
23121 | break; | |
c906108c | 23122 | default: |
d97bc12b | 23123 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 23124 | die->attrs[i].form); |
d97bc12b | 23125 | break; |
c906108c | 23126 | } |
d97bc12b | 23127 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
23128 | } |
23129 | } | |
23130 | ||
f9aca02d | 23131 | static void |
d97bc12b | 23132 | dump_die_for_error (struct die_info *die) |
c906108c | 23133 | { |
d97bc12b DE |
23134 | dump_die_shallow (gdb_stderr, 0, die); |
23135 | } | |
23136 | ||
23137 | static void | |
23138 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
23139 | { | |
23140 | int indent = level * 4; | |
23141 | ||
23142 | gdb_assert (die != NULL); | |
23143 | ||
23144 | if (level >= max_level) | |
23145 | return; | |
23146 | ||
23147 | dump_die_shallow (f, indent, die); | |
23148 | ||
23149 | if (die->child != NULL) | |
c906108c | 23150 | { |
d97bc12b DE |
23151 | print_spaces (indent, f); |
23152 | fprintf_unfiltered (f, " Children:"); | |
23153 | if (level + 1 < max_level) | |
23154 | { | |
23155 | fprintf_unfiltered (f, "\n"); | |
23156 | dump_die_1 (f, level + 1, max_level, die->child); | |
23157 | } | |
23158 | else | |
23159 | { | |
3e43a32a MS |
23160 | fprintf_unfiltered (f, |
23161 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
23162 | } |
23163 | } | |
23164 | ||
23165 | if (die->sibling != NULL && level > 0) | |
23166 | { | |
23167 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
23168 | } |
23169 | } | |
23170 | ||
d97bc12b DE |
23171 | /* This is called from the pdie macro in gdbinit.in. |
23172 | It's not static so gcc will keep a copy callable from gdb. */ | |
23173 | ||
23174 | void | |
23175 | dump_die (struct die_info *die, int max_level) | |
23176 | { | |
23177 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
23178 | } | |
23179 | ||
f9aca02d | 23180 | static void |
51545339 | 23181 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 23182 | { |
51545339 | 23183 | void **slot; |
c906108c | 23184 | |
9c541725 PA |
23185 | slot = htab_find_slot_with_hash (cu->die_hash, die, |
23186 | to_underlying (die->sect_off), | |
b64f50a1 | 23187 | INSERT); |
51545339 DJ |
23188 | |
23189 | *slot = die; | |
c906108c SS |
23190 | } |
23191 | ||
b64f50a1 JK |
23192 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
23193 | required kind. */ | |
23194 | ||
23195 | static sect_offset | |
ff39bb5e | 23196 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
93311388 | 23197 | { |
7771576e | 23198 | if (attr_form_is_ref (attr)) |
9c541725 | 23199 | return (sect_offset) DW_UNSND (attr); |
93311388 | 23200 | |
b98664d3 | 23201 | complaint (_("unsupported die ref attribute form: '%s'"), |
93311388 | 23202 | dwarf_form_name (attr->form)); |
9c541725 | 23203 | return {}; |
c906108c SS |
23204 | } |
23205 | ||
43bbcdc2 PH |
23206 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
23207 | * the value held by the attribute is not constant. */ | |
a02abb62 | 23208 | |
43bbcdc2 | 23209 | static LONGEST |
ff39bb5e | 23210 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
a02abb62 | 23211 | { |
663c44ac | 23212 | if (attr->form == DW_FORM_sdata || attr->form == DW_FORM_implicit_const) |
a02abb62 JB |
23213 | return DW_SND (attr); |
23214 | else if (attr->form == DW_FORM_udata | |
23215 | || attr->form == DW_FORM_data1 | |
23216 | || attr->form == DW_FORM_data2 | |
23217 | || attr->form == DW_FORM_data4 | |
23218 | || attr->form == DW_FORM_data8) | |
23219 | return DW_UNSND (attr); | |
23220 | else | |
23221 | { | |
0224619f | 23222 | /* For DW_FORM_data16 see attr_form_is_constant. */ |
b98664d3 | 23223 | complaint (_("Attribute value is not a constant (%s)"), |
a02abb62 JB |
23224 | dwarf_form_name (attr->form)); |
23225 | return default_value; | |
23226 | } | |
23227 | } | |
23228 | ||
348e048f DE |
23229 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
23230 | On entry *REF_CU is the CU of SRC_DIE. | |
23231 | On exit *REF_CU is the CU of the result. */ | |
23232 | ||
23233 | static struct die_info * | |
ff39bb5e | 23234 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
23235 | struct dwarf2_cu **ref_cu) |
23236 | { | |
23237 | struct die_info *die; | |
23238 | ||
7771576e | 23239 | if (attr_form_is_ref (attr)) |
348e048f | 23240 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 23241 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
23242 | die = follow_die_sig (src_die, attr, ref_cu); |
23243 | else | |
23244 | { | |
23245 | dump_die_for_error (src_die); | |
23246 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
518817b3 | 23247 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
348e048f DE |
23248 | } |
23249 | ||
23250 | return die; | |
03dd20cc DJ |
23251 | } |
23252 | ||
5c631832 | 23253 | /* Follow reference OFFSET. |
673bfd45 DE |
23254 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
23255 | On exit *REF_CU is the CU of the result. | |
23256 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 23257 | |
f9aca02d | 23258 | static struct die_info * |
9c541725 | 23259 | follow_die_offset (sect_offset sect_off, int offset_in_dwz, |
36586728 | 23260 | struct dwarf2_cu **ref_cu) |
c906108c | 23261 | { |
10b3939b | 23262 | struct die_info temp_die; |
f2f0e013 | 23263 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
518817b3 SM |
23264 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23265 | = cu->per_cu->dwarf2_per_objfile; | |
10b3939b | 23266 | |
348e048f DE |
23267 | gdb_assert (cu->per_cu != NULL); |
23268 | ||
98bfdba5 PA |
23269 | target_cu = cu; |
23270 | ||
3019eac3 | 23271 | if (cu->per_cu->is_debug_types) |
348e048f DE |
23272 | { |
23273 | /* .debug_types CUs cannot reference anything outside their CU. | |
23274 | If they need to, they have to reference a signatured type via | |
55f1336d | 23275 | DW_FORM_ref_sig8. */ |
9c541725 | 23276 | if (!offset_in_cu_p (&cu->header, sect_off)) |
5c631832 | 23277 | return NULL; |
348e048f | 23278 | } |
36586728 | 23279 | else if (offset_in_dwz != cu->per_cu->is_dwz |
9c541725 | 23280 | || !offset_in_cu_p (&cu->header, sect_off)) |
10b3939b DJ |
23281 | { |
23282 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 23283 | |
9c541725 | 23284 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
ed2dc618 | 23285 | dwarf2_per_objfile); |
03dd20cc DJ |
23286 | |
23287 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad | 23288 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
58f0c718 | 23289 | load_full_comp_unit (per_cu, false, cu->language); |
03dd20cc | 23290 | |
10b3939b DJ |
23291 | target_cu = per_cu->cu; |
23292 | } | |
98bfdba5 PA |
23293 | else if (cu->dies == NULL) |
23294 | { | |
23295 | /* We're loading full DIEs during partial symbol reading. */ | |
23296 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
58f0c718 | 23297 | load_full_comp_unit (cu->per_cu, false, language_minimal); |
98bfdba5 | 23298 | } |
c906108c | 23299 | |
f2f0e013 | 23300 | *ref_cu = target_cu; |
9c541725 | 23301 | temp_die.sect_off = sect_off; |
c24bdb02 KS |
23302 | |
23303 | if (target_cu != cu) | |
23304 | target_cu->ancestor = cu; | |
23305 | ||
9a3c8263 | 23306 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
9c541725 PA |
23307 | &temp_die, |
23308 | to_underlying (sect_off)); | |
5c631832 | 23309 | } |
10b3939b | 23310 | |
5c631832 JK |
23311 | /* Follow reference attribute ATTR of SRC_DIE. |
23312 | On entry *REF_CU is the CU of SRC_DIE. | |
23313 | On exit *REF_CU is the CU of the result. */ | |
23314 | ||
23315 | static struct die_info * | |
ff39bb5e | 23316 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
23317 | struct dwarf2_cu **ref_cu) |
23318 | { | |
9c541725 | 23319 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
23320 | struct dwarf2_cu *cu = *ref_cu; |
23321 | struct die_info *die; | |
23322 | ||
9c541725 | 23323 | die = follow_die_offset (sect_off, |
36586728 TT |
23324 | (attr->form == DW_FORM_GNU_ref_alt |
23325 | || cu->per_cu->is_dwz), | |
23326 | ref_cu); | |
5c631832 | 23327 | if (!die) |
9d8780f0 SM |
23328 | error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE " |
23329 | "at %s [in module %s]"), | |
23330 | sect_offset_str (sect_off), sect_offset_str (src_die->sect_off), | |
518817b3 | 23331 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
348e048f | 23332 | |
5c631832 JK |
23333 | return die; |
23334 | } | |
23335 | ||
9c541725 | 23336 | /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU. |
d83e736b | 23337 | Returned value is intended for DW_OP_call*. Returned |
e3b94546 SM |
23338 | dwarf2_locexpr_baton->data has lifetime of |
23339 | PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */ | |
5c631832 JK |
23340 | |
23341 | struct dwarf2_locexpr_baton | |
9c541725 | 23342 | dwarf2_fetch_die_loc_sect_off (sect_offset sect_off, |
8b9737bf TT |
23343 | struct dwarf2_per_cu_data *per_cu, |
23344 | CORE_ADDR (*get_frame_pc) (void *baton), | |
e4a62c65 | 23345 | void *baton, bool resolve_abstract_p) |
5c631832 | 23346 | { |
918dd910 | 23347 | struct dwarf2_cu *cu; |
5c631832 JK |
23348 | struct die_info *die; |
23349 | struct attribute *attr; | |
23350 | struct dwarf2_locexpr_baton retval; | |
12359b5e SM |
23351 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
23352 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8cf6f0b1 | 23353 | |
918dd910 | 23354 | if (per_cu->cu == NULL) |
58f0c718 | 23355 | load_cu (per_cu, false); |
918dd910 | 23356 | cu = per_cu->cu; |
cc12ce38 DE |
23357 | if (cu == NULL) |
23358 | { | |
23359 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
23360 | Instead just throw an error, not much else we can do. */ | |
9d8780f0 SM |
23361 | error (_("Dwarf Error: Dummy CU at %s referenced in module %s"), |
23362 | sect_offset_str (sect_off), objfile_name (objfile)); | |
cc12ce38 | 23363 | } |
918dd910 | 23364 | |
9c541725 | 23365 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
5c631832 | 23366 | if (!die) |
9d8780f0 SM |
23367 | error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"), |
23368 | sect_offset_str (sect_off), objfile_name (objfile)); | |
5c631832 JK |
23369 | |
23370 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
e4a62c65 | 23371 | if (!attr && resolve_abstract_p |
3360b6e7 | 23372 | && (dwarf2_per_objfile->abstract_to_concrete.find (die->sect_off) |
e4a62c65 TV |
23373 | != dwarf2_per_objfile->abstract_to_concrete.end ())) |
23374 | { | |
23375 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
eba4caf2 TV |
23376 | CORE_ADDR baseaddr |
23377 | = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
23378 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
e4a62c65 | 23379 | |
3360b6e7 TV |
23380 | for (const auto &cand_off |
23381 | : dwarf2_per_objfile->abstract_to_concrete[die->sect_off]) | |
e4a62c65 | 23382 | { |
3360b6e7 TV |
23383 | struct dwarf2_cu *cand_cu = cu; |
23384 | struct die_info *cand | |
23385 | = follow_die_offset (cand_off, per_cu->is_dwz, &cand_cu); | |
23386 | if (!cand | |
23387 | || !cand->parent | |
e4a62c65 TV |
23388 | || cand->parent->tag != DW_TAG_subprogram) |
23389 | continue; | |
23390 | ||
23391 | CORE_ADDR pc_low, pc_high; | |
23392 | get_scope_pc_bounds (cand->parent, &pc_low, &pc_high, cu); | |
eba4caf2 TV |
23393 | if (pc_low == ((CORE_ADDR) -1)) |
23394 | continue; | |
23395 | pc_low = gdbarch_adjust_dwarf2_addr (gdbarch, pc_low + baseaddr); | |
23396 | pc_high = gdbarch_adjust_dwarf2_addr (gdbarch, pc_high + baseaddr); | |
23397 | if (!(pc_low <= pc && pc < pc_high)) | |
e4a62c65 TV |
23398 | continue; |
23399 | ||
23400 | die = cand; | |
23401 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
23402 | break; | |
23403 | } | |
23404 | } | |
23405 | ||
5c631832 JK |
23406 | if (!attr) |
23407 | { | |
e103e986 JK |
23408 | /* DWARF: "If there is no such attribute, then there is no effect.". |
23409 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 23410 | |
e103e986 | 23411 | retval.data = NULL; |
5c631832 JK |
23412 | retval.size = 0; |
23413 | } | |
8cf6f0b1 TT |
23414 | else if (attr_form_is_section_offset (attr)) |
23415 | { | |
23416 | struct dwarf2_loclist_baton loclist_baton; | |
23417 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
23418 | size_t size; | |
23419 | ||
23420 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
23421 | ||
23422 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
23423 | &size, pc); | |
23424 | retval.size = size; | |
23425 | } | |
5c631832 JK |
23426 | else |
23427 | { | |
23428 | if (!attr_form_is_block (attr)) | |
9d8780f0 | 23429 | error (_("Dwarf Error: DIE at %s referenced in module %s " |
5c631832 | 23430 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), |
9d8780f0 | 23431 | sect_offset_str (sect_off), objfile_name (objfile)); |
5c631832 JK |
23432 | |
23433 | retval.data = DW_BLOCK (attr)->data; | |
23434 | retval.size = DW_BLOCK (attr)->size; | |
23435 | } | |
23436 | retval.per_cu = cu->per_cu; | |
918dd910 | 23437 | |
ed2dc618 | 23438 | age_cached_comp_units (dwarf2_per_objfile); |
918dd910 | 23439 | |
5c631832 | 23440 | return retval; |
348e048f DE |
23441 | } |
23442 | ||
8b9737bf TT |
23443 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
23444 | offset. */ | |
23445 | ||
23446 | struct dwarf2_locexpr_baton | |
23447 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
23448 | struct dwarf2_per_cu_data *per_cu, | |
23449 | CORE_ADDR (*get_frame_pc) (void *baton), | |
23450 | void *baton) | |
23451 | { | |
9c541725 | 23452 | sect_offset sect_off = per_cu->sect_off + to_underlying (offset_in_cu); |
8b9737bf | 23453 | |
9c541725 | 23454 | return dwarf2_fetch_die_loc_sect_off (sect_off, per_cu, get_frame_pc, baton); |
8b9737bf TT |
23455 | } |
23456 | ||
b6807d98 TT |
23457 | /* Write a constant of a given type as target-ordered bytes into |
23458 | OBSTACK. */ | |
23459 | ||
23460 | static const gdb_byte * | |
23461 | write_constant_as_bytes (struct obstack *obstack, | |
23462 | enum bfd_endian byte_order, | |
23463 | struct type *type, | |
23464 | ULONGEST value, | |
23465 | LONGEST *len) | |
23466 | { | |
23467 | gdb_byte *result; | |
23468 | ||
23469 | *len = TYPE_LENGTH (type); | |
224c3ddb | 23470 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
23471 | store_unsigned_integer (result, *len, byte_order, value); |
23472 | ||
23473 | return result; | |
23474 | } | |
23475 | ||
23476 | /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a | |
23477 | pointer to the constant bytes and set LEN to the length of the | |
23478 | data. If memory is needed, allocate it on OBSTACK. If the DIE | |
23479 | does not have a DW_AT_const_value, return NULL. */ | |
23480 | ||
23481 | const gdb_byte * | |
9c541725 | 23482 | dwarf2_fetch_constant_bytes (sect_offset sect_off, |
b6807d98 TT |
23483 | struct dwarf2_per_cu_data *per_cu, |
23484 | struct obstack *obstack, | |
23485 | LONGEST *len) | |
23486 | { | |
23487 | struct dwarf2_cu *cu; | |
23488 | struct die_info *die; | |
23489 | struct attribute *attr; | |
23490 | const gdb_byte *result = NULL; | |
23491 | struct type *type; | |
23492 | LONGEST value; | |
23493 | enum bfd_endian byte_order; | |
e3b94546 | 23494 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
b6807d98 | 23495 | |
b6807d98 | 23496 | if (per_cu->cu == NULL) |
58f0c718 | 23497 | load_cu (per_cu, false); |
b6807d98 | 23498 | cu = per_cu->cu; |
cc12ce38 DE |
23499 | if (cu == NULL) |
23500 | { | |
23501 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
23502 | Instead just throw an error, not much else we can do. */ | |
9d8780f0 SM |
23503 | error (_("Dwarf Error: Dummy CU at %s referenced in module %s"), |
23504 | sect_offset_str (sect_off), objfile_name (objfile)); | |
cc12ce38 | 23505 | } |
b6807d98 | 23506 | |
9c541725 | 23507 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
b6807d98 | 23508 | if (!die) |
9d8780f0 SM |
23509 | error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"), |
23510 | sect_offset_str (sect_off), objfile_name (objfile)); | |
b6807d98 TT |
23511 | |
23512 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
23513 | if (attr == NULL) | |
23514 | return NULL; | |
23515 | ||
e3b94546 | 23516 | byte_order = (bfd_big_endian (objfile->obfd) |
b6807d98 TT |
23517 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); |
23518 | ||
23519 | switch (attr->form) | |
23520 | { | |
23521 | case DW_FORM_addr: | |
336d760d | 23522 | case DW_FORM_addrx: |
b6807d98 TT |
23523 | case DW_FORM_GNU_addr_index: |
23524 | { | |
23525 | gdb_byte *tem; | |
23526 | ||
23527 | *len = cu->header.addr_size; | |
224c3ddb | 23528 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
23529 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); |
23530 | result = tem; | |
23531 | } | |
23532 | break; | |
23533 | case DW_FORM_string: | |
23534 | case DW_FORM_strp: | |
cf532bd1 | 23535 | case DW_FORM_strx: |
b6807d98 TT |
23536 | case DW_FORM_GNU_str_index: |
23537 | case DW_FORM_GNU_strp_alt: | |
23538 | /* DW_STRING is already allocated on the objfile obstack, point | |
23539 | directly to it. */ | |
23540 | result = (const gdb_byte *) DW_STRING (attr); | |
23541 | *len = strlen (DW_STRING (attr)); | |
23542 | break; | |
23543 | case DW_FORM_block1: | |
23544 | case DW_FORM_block2: | |
23545 | case DW_FORM_block4: | |
23546 | case DW_FORM_block: | |
23547 | case DW_FORM_exprloc: | |
0224619f | 23548 | case DW_FORM_data16: |
b6807d98 TT |
23549 | result = DW_BLOCK (attr)->data; |
23550 | *len = DW_BLOCK (attr)->size; | |
23551 | break; | |
23552 | ||
23553 | /* The DW_AT_const_value attributes are supposed to carry the | |
23554 | symbol's value "represented as it would be on the target | |
23555 | architecture." By the time we get here, it's already been | |
23556 | converted to host endianness, so we just need to sign- or | |
23557 | zero-extend it as appropriate. */ | |
23558 | case DW_FORM_data1: | |
23559 | type = die_type (die, cu); | |
23560 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
23561 | if (result == NULL) | |
23562 | result = write_constant_as_bytes (obstack, byte_order, | |
23563 | type, value, len); | |
23564 | break; | |
23565 | case DW_FORM_data2: | |
23566 | type = die_type (die, cu); | |
23567 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
23568 | if (result == NULL) | |
23569 | result = write_constant_as_bytes (obstack, byte_order, | |
23570 | type, value, len); | |
23571 | break; | |
23572 | case DW_FORM_data4: | |
23573 | type = die_type (die, cu); | |
23574 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
23575 | if (result == NULL) | |
23576 | result = write_constant_as_bytes (obstack, byte_order, | |
23577 | type, value, len); | |
23578 | break; | |
23579 | case DW_FORM_data8: | |
23580 | type = die_type (die, cu); | |
23581 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
23582 | if (result == NULL) | |
23583 | result = write_constant_as_bytes (obstack, byte_order, | |
23584 | type, value, len); | |
23585 | break; | |
23586 | ||
23587 | case DW_FORM_sdata: | |
663c44ac | 23588 | case DW_FORM_implicit_const: |
b6807d98 TT |
23589 | type = die_type (die, cu); |
23590 | result = write_constant_as_bytes (obstack, byte_order, | |
23591 | type, DW_SND (attr), len); | |
23592 | break; | |
23593 | ||
23594 | case DW_FORM_udata: | |
23595 | type = die_type (die, cu); | |
23596 | result = write_constant_as_bytes (obstack, byte_order, | |
23597 | type, DW_UNSND (attr), len); | |
23598 | break; | |
23599 | ||
23600 | default: | |
b98664d3 | 23601 | complaint (_("unsupported const value attribute form: '%s'"), |
b6807d98 TT |
23602 | dwarf_form_name (attr->form)); |
23603 | break; | |
23604 | } | |
23605 | ||
23606 | return result; | |
23607 | } | |
23608 | ||
7942e96e AA |
23609 | /* Return the type of the die at OFFSET in PER_CU. Return NULL if no |
23610 | valid type for this die is found. */ | |
23611 | ||
23612 | struct type * | |
9c541725 | 23613 | dwarf2_fetch_die_type_sect_off (sect_offset sect_off, |
7942e96e AA |
23614 | struct dwarf2_per_cu_data *per_cu) |
23615 | { | |
23616 | struct dwarf2_cu *cu; | |
23617 | struct die_info *die; | |
23618 | ||
7942e96e | 23619 | if (per_cu->cu == NULL) |
58f0c718 | 23620 | load_cu (per_cu, false); |
7942e96e AA |
23621 | cu = per_cu->cu; |
23622 | if (!cu) | |
23623 | return NULL; | |
23624 | ||
9c541725 | 23625 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
7942e96e AA |
23626 | if (!die) |
23627 | return NULL; | |
23628 | ||
23629 | return die_type (die, cu); | |
23630 | } | |
23631 | ||
8a9b8146 TT |
23632 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
23633 | PER_CU. */ | |
23634 | ||
23635 | struct type * | |
b64f50a1 | 23636 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
23637 | struct dwarf2_per_cu_data *per_cu) |
23638 | { | |
9c541725 | 23639 | sect_offset die_offset_sect = per_cu->sect_off + to_underlying (die_offset); |
b64f50a1 | 23640 | return get_die_type_at_offset (die_offset_sect, per_cu); |
8a9b8146 TT |
23641 | } |
23642 | ||
ac9ec31b | 23643 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 23644 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
23645 | On exit *REF_CU is the CU of the result. |
23646 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
23647 | |
23648 | static struct die_info * | |
ac9ec31b DE |
23649 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
23650 | struct dwarf2_cu **ref_cu) | |
348e048f | 23651 | { |
348e048f | 23652 | struct die_info temp_die; |
c24bdb02 | 23653 | struct dwarf2_cu *sig_cu, *cu = *ref_cu; |
348e048f DE |
23654 | struct die_info *die; |
23655 | ||
ac9ec31b DE |
23656 | /* While it might be nice to assert sig_type->type == NULL here, |
23657 | we can get here for DW_AT_imported_declaration where we need | |
23658 | the DIE not the type. */ | |
348e048f DE |
23659 | |
23660 | /* If necessary, add it to the queue and load its DIEs. */ | |
23661 | ||
95554aad | 23662 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 23663 | read_signatured_type (sig_type); |
348e048f | 23664 | |
348e048f | 23665 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 23666 | gdb_assert (sig_cu != NULL); |
9c541725 PA |
23667 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
23668 | temp_die.sect_off = sig_type->type_offset_in_section; | |
9a3c8263 | 23669 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
9c541725 | 23670 | to_underlying (temp_die.sect_off)); |
348e048f DE |
23671 | if (die) |
23672 | { | |
ed2dc618 | 23673 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 23674 | = (*ref_cu)->per_cu->dwarf2_per_objfile; |
ed2dc618 | 23675 | |
796a7ff8 DE |
23676 | /* For .gdb_index version 7 keep track of included TUs. |
23677 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
23678 | if (dwarf2_per_objfile->index_table != NULL | |
23679 | && dwarf2_per_objfile->index_table->version <= 7) | |
23680 | { | |
23681 | VEC_safe_push (dwarf2_per_cu_ptr, | |
23682 | (*ref_cu)->per_cu->imported_symtabs, | |
23683 | sig_cu->per_cu); | |
23684 | } | |
23685 | ||
348e048f | 23686 | *ref_cu = sig_cu; |
c24bdb02 KS |
23687 | if (sig_cu != cu) |
23688 | sig_cu->ancestor = cu; | |
23689 | ||
348e048f DE |
23690 | return die; |
23691 | } | |
23692 | ||
ac9ec31b DE |
23693 | return NULL; |
23694 | } | |
23695 | ||
23696 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
23697 | On entry *REF_CU is the CU of SRC_DIE. | |
23698 | On exit *REF_CU is the CU of the result. | |
23699 | The result is the DIE of the type. | |
23700 | If the referenced type cannot be found an error is thrown. */ | |
23701 | ||
23702 | static struct die_info * | |
ff39bb5e | 23703 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
23704 | struct dwarf2_cu **ref_cu) |
23705 | { | |
23706 | ULONGEST signature = DW_SIGNATURE (attr); | |
23707 | struct signatured_type *sig_type; | |
23708 | struct die_info *die; | |
23709 | ||
23710 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
23711 | ||
a2ce51a0 | 23712 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
23713 | /* sig_type will be NULL if the signatured type is missing from |
23714 | the debug info. */ | |
23715 | if (sig_type == NULL) | |
23716 | { | |
23717 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
9d8780f0 SM |
23718 | " from DIE at %s [in module %s]"), |
23719 | hex_string (signature), sect_offset_str (src_die->sect_off), | |
518817b3 | 23720 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23721 | } |
23722 | ||
23723 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
23724 | if (die == NULL) | |
23725 | { | |
23726 | dump_die_for_error (src_die); | |
23727 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
9d8780f0 SM |
23728 | " from DIE at %s [in module %s]"), |
23729 | hex_string (signature), sect_offset_str (src_die->sect_off), | |
518817b3 | 23730 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23731 | } |
23732 | ||
23733 | return die; | |
23734 | } | |
23735 | ||
23736 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
23737 | reading in and processing the type unit if necessary. */ | |
23738 | ||
23739 | static struct type * | |
23740 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
23741 | struct dwarf2_cu *cu) | |
23742 | { | |
518817b3 SM |
23743 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23744 | = cu->per_cu->dwarf2_per_objfile; | |
ac9ec31b DE |
23745 | struct signatured_type *sig_type; |
23746 | struct dwarf2_cu *type_cu; | |
23747 | struct die_info *type_die; | |
23748 | struct type *type; | |
23749 | ||
a2ce51a0 | 23750 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
23751 | /* sig_type will be NULL if the signatured type is missing from |
23752 | the debug info. */ | |
23753 | if (sig_type == NULL) | |
23754 | { | |
b98664d3 | 23755 | complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced" |
9d8780f0 SM |
23756 | " from DIE at %s [in module %s]"), |
23757 | hex_string (signature), sect_offset_str (die->sect_off), | |
4262abfb | 23758 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23759 | return build_error_marker_type (cu, die); |
23760 | } | |
23761 | ||
23762 | /* If we already know the type we're done. */ | |
23763 | if (sig_type->type != NULL) | |
23764 | return sig_type->type; | |
23765 | ||
23766 | type_cu = cu; | |
23767 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
23768 | if (type_die != NULL) | |
23769 | { | |
23770 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
23771 | is created. This is important, for example, because for c++ classes | |
23772 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
23773 | type = read_type_die (type_die, type_cu); | |
23774 | if (type == NULL) | |
23775 | { | |
b98664d3 | 23776 | complaint (_("Dwarf Error: Cannot build signatured type %s" |
9d8780f0 SM |
23777 | " referenced from DIE at %s [in module %s]"), |
23778 | hex_string (signature), sect_offset_str (die->sect_off), | |
4262abfb | 23779 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23780 | type = build_error_marker_type (cu, die); |
23781 | } | |
23782 | } | |
23783 | else | |
23784 | { | |
b98664d3 | 23785 | complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced" |
9d8780f0 SM |
23786 | " from DIE at %s [in module %s]"), |
23787 | hex_string (signature), sect_offset_str (die->sect_off), | |
4262abfb | 23788 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23789 | type = build_error_marker_type (cu, die); |
23790 | } | |
23791 | sig_type->type = type; | |
23792 | ||
23793 | return type; | |
23794 | } | |
23795 | ||
23796 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
23797 | reading in and processing the type unit if necessary. */ | |
23798 | ||
23799 | static struct type * | |
ff39bb5e | 23800 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 23801 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
23802 | { |
23803 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
7771576e | 23804 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
23805 | { |
23806 | struct dwarf2_cu *type_cu = cu; | |
23807 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
23808 | ||
23809 | return read_type_die (type_die, type_cu); | |
23810 | } | |
23811 | else if (attr->form == DW_FORM_ref_sig8) | |
23812 | { | |
23813 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
23814 | } | |
23815 | else | |
23816 | { | |
518817b3 SM |
23817 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23818 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 23819 | |
b98664d3 | 23820 | complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE" |
9d8780f0 SM |
23821 | " at %s [in module %s]"), |
23822 | dwarf_form_name (attr->form), sect_offset_str (die->sect_off), | |
4262abfb | 23823 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23824 | return build_error_marker_type (cu, die); |
23825 | } | |
348e048f DE |
23826 | } |
23827 | ||
e5fe5e75 | 23828 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
23829 | |
23830 | static void | |
e5fe5e75 | 23831 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 23832 | { |
52dc124a | 23833 | struct signatured_type *sig_type; |
348e048f | 23834 | |
f4dc4d17 DE |
23835 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
23836 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
23837 | ||
6721b2ec DE |
23838 | /* We have the per_cu, but we need the signatured_type. |
23839 | Fortunately this is an easy translation. */ | |
23840 | gdb_assert (per_cu->is_debug_types); | |
23841 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 23842 | |
6721b2ec | 23843 | gdb_assert (per_cu->cu == NULL); |
348e048f | 23844 | |
52dc124a | 23845 | read_signatured_type (sig_type); |
348e048f | 23846 | |
6721b2ec | 23847 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
23848 | } |
23849 | ||
dee91e82 DE |
23850 | /* die_reader_func for read_signatured_type. |
23851 | This is identical to load_full_comp_unit_reader, | |
23852 | but is kept separate for now. */ | |
348e048f DE |
23853 | |
23854 | static void | |
dee91e82 | 23855 | read_signatured_type_reader (const struct die_reader_specs *reader, |
d521ce57 | 23856 | const gdb_byte *info_ptr, |
dee91e82 DE |
23857 | struct die_info *comp_unit_die, |
23858 | int has_children, | |
23859 | void *data) | |
348e048f | 23860 | { |
dee91e82 | 23861 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 23862 | |
dee91e82 DE |
23863 | gdb_assert (cu->die_hash == NULL); |
23864 | cu->die_hash = | |
23865 | htab_create_alloc_ex (cu->header.length / 12, | |
23866 | die_hash, | |
23867 | die_eq, | |
23868 | NULL, | |
23869 | &cu->comp_unit_obstack, | |
23870 | hashtab_obstack_allocate, | |
23871 | dummy_obstack_deallocate); | |
348e048f | 23872 | |
dee91e82 DE |
23873 | if (has_children) |
23874 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
23875 | &info_ptr, comp_unit_die); | |
23876 | cu->dies = comp_unit_die; | |
23877 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
23878 | |
23879 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 23880 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 23881 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
23882 | or we won't be able to build types correctly. |
23883 | Similarly, if we do not read the producer, we can not apply | |
23884 | producer-specific interpretation. */ | |
95554aad | 23885 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 23886 | } |
348e048f | 23887 | |
3019eac3 DE |
23888 | /* Read in a signatured type and build its CU and DIEs. |
23889 | If the type is a stub for the real type in a DWO file, | |
23890 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
23891 | |
23892 | static void | |
23893 | read_signatured_type (struct signatured_type *sig_type) | |
23894 | { | |
23895 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 23896 | |
3019eac3 | 23897 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 23898 | gdb_assert (per_cu->cu == NULL); |
348e048f | 23899 | |
58f0c718 | 23900 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, false, |
f4dc4d17 | 23901 | read_signatured_type_reader, NULL); |
7ee85ab1 | 23902 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
23903 | } |
23904 | ||
c906108c SS |
23905 | /* Decode simple location descriptions. |
23906 | Given a pointer to a dwarf block that defines a location, compute | |
23907 | the location and return the value. | |
23908 | ||
4cecd739 DJ |
23909 | NOTE drow/2003-11-18: This function is called in two situations |
23910 | now: for the address of static or global variables (partial symbols | |
23911 | only) and for offsets into structures which are expected to be | |
23912 | (more or less) constant. The partial symbol case should go away, | |
23913 | and only the constant case should remain. That will let this | |
23914 | function complain more accurately. A few special modes are allowed | |
23915 | without complaint for global variables (for instance, global | |
23916 | register values and thread-local values). | |
c906108c SS |
23917 | |
23918 | A location description containing no operations indicates that the | |
4cecd739 | 23919 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
23920 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
23921 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
23922 | complaint. |
23923 | ||
23924 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
23925 | |
23926 | static CORE_ADDR | |
e7c27a73 | 23927 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 23928 | { |
518817b3 | 23929 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
56eb65bd SP |
23930 | size_t i; |
23931 | size_t size = blk->size; | |
d521ce57 | 23932 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
23933 | CORE_ADDR stack[64]; |
23934 | int stacki; | |
23935 | unsigned int bytes_read, unsnd; | |
23936 | gdb_byte op; | |
c906108c | 23937 | |
21ae7a4d JK |
23938 | i = 0; |
23939 | stacki = 0; | |
23940 | stack[stacki] = 0; | |
23941 | stack[++stacki] = 0; | |
23942 | ||
23943 | while (i < size) | |
23944 | { | |
23945 | op = data[i++]; | |
23946 | switch (op) | |
23947 | { | |
23948 | case DW_OP_lit0: | |
23949 | case DW_OP_lit1: | |
23950 | case DW_OP_lit2: | |
23951 | case DW_OP_lit3: | |
23952 | case DW_OP_lit4: | |
23953 | case DW_OP_lit5: | |
23954 | case DW_OP_lit6: | |
23955 | case DW_OP_lit7: | |
23956 | case DW_OP_lit8: | |
23957 | case DW_OP_lit9: | |
23958 | case DW_OP_lit10: | |
23959 | case DW_OP_lit11: | |
23960 | case DW_OP_lit12: | |
23961 | case DW_OP_lit13: | |
23962 | case DW_OP_lit14: | |
23963 | case DW_OP_lit15: | |
23964 | case DW_OP_lit16: | |
23965 | case DW_OP_lit17: | |
23966 | case DW_OP_lit18: | |
23967 | case DW_OP_lit19: | |
23968 | case DW_OP_lit20: | |
23969 | case DW_OP_lit21: | |
23970 | case DW_OP_lit22: | |
23971 | case DW_OP_lit23: | |
23972 | case DW_OP_lit24: | |
23973 | case DW_OP_lit25: | |
23974 | case DW_OP_lit26: | |
23975 | case DW_OP_lit27: | |
23976 | case DW_OP_lit28: | |
23977 | case DW_OP_lit29: | |
23978 | case DW_OP_lit30: | |
23979 | case DW_OP_lit31: | |
23980 | stack[++stacki] = op - DW_OP_lit0; | |
23981 | break; | |
f1bea926 | 23982 | |
21ae7a4d JK |
23983 | case DW_OP_reg0: |
23984 | case DW_OP_reg1: | |
23985 | case DW_OP_reg2: | |
23986 | case DW_OP_reg3: | |
23987 | case DW_OP_reg4: | |
23988 | case DW_OP_reg5: | |
23989 | case DW_OP_reg6: | |
23990 | case DW_OP_reg7: | |
23991 | case DW_OP_reg8: | |
23992 | case DW_OP_reg9: | |
23993 | case DW_OP_reg10: | |
23994 | case DW_OP_reg11: | |
23995 | case DW_OP_reg12: | |
23996 | case DW_OP_reg13: | |
23997 | case DW_OP_reg14: | |
23998 | case DW_OP_reg15: | |
23999 | case DW_OP_reg16: | |
24000 | case DW_OP_reg17: | |
24001 | case DW_OP_reg18: | |
24002 | case DW_OP_reg19: | |
24003 | case DW_OP_reg20: | |
24004 | case DW_OP_reg21: | |
24005 | case DW_OP_reg22: | |
24006 | case DW_OP_reg23: | |
24007 | case DW_OP_reg24: | |
24008 | case DW_OP_reg25: | |
24009 | case DW_OP_reg26: | |
24010 | case DW_OP_reg27: | |
24011 | case DW_OP_reg28: | |
24012 | case DW_OP_reg29: | |
24013 | case DW_OP_reg30: | |
24014 | case DW_OP_reg31: | |
24015 | stack[++stacki] = op - DW_OP_reg0; | |
24016 | if (i < size) | |
24017 | dwarf2_complex_location_expr_complaint (); | |
24018 | break; | |
c906108c | 24019 | |
21ae7a4d JK |
24020 | case DW_OP_regx: |
24021 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
24022 | i += bytes_read; | |
24023 | stack[++stacki] = unsnd; | |
24024 | if (i < size) | |
24025 | dwarf2_complex_location_expr_complaint (); | |
24026 | break; | |
c906108c | 24027 | |
21ae7a4d JK |
24028 | case DW_OP_addr: |
24029 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
24030 | cu, &bytes_read); | |
24031 | i += bytes_read; | |
24032 | break; | |
d53d4ac5 | 24033 | |
21ae7a4d JK |
24034 | case DW_OP_const1u: |
24035 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
24036 | i += 1; | |
24037 | break; | |
24038 | ||
24039 | case DW_OP_const1s: | |
24040 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
24041 | i += 1; | |
24042 | break; | |
24043 | ||
24044 | case DW_OP_const2u: | |
24045 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
24046 | i += 2; | |
24047 | break; | |
24048 | ||
24049 | case DW_OP_const2s: | |
24050 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
24051 | i += 2; | |
24052 | break; | |
d53d4ac5 | 24053 | |
21ae7a4d JK |
24054 | case DW_OP_const4u: |
24055 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
24056 | i += 4; | |
24057 | break; | |
24058 | ||
24059 | case DW_OP_const4s: | |
24060 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
24061 | i += 4; | |
24062 | break; | |
24063 | ||
585861ea JK |
24064 | case DW_OP_const8u: |
24065 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
24066 | i += 8; | |
24067 | break; | |
24068 | ||
21ae7a4d JK |
24069 | case DW_OP_constu: |
24070 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
24071 | &bytes_read); | |
24072 | i += bytes_read; | |
24073 | break; | |
24074 | ||
24075 | case DW_OP_consts: | |
24076 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
24077 | i += bytes_read; | |
24078 | break; | |
24079 | ||
24080 | case DW_OP_dup: | |
24081 | stack[stacki + 1] = stack[stacki]; | |
24082 | stacki++; | |
24083 | break; | |
24084 | ||
24085 | case DW_OP_plus: | |
24086 | stack[stacki - 1] += stack[stacki]; | |
24087 | stacki--; | |
24088 | break; | |
24089 | ||
24090 | case DW_OP_plus_uconst: | |
24091 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
24092 | &bytes_read); | |
24093 | i += bytes_read; | |
24094 | break; | |
24095 | ||
24096 | case DW_OP_minus: | |
24097 | stack[stacki - 1] -= stack[stacki]; | |
24098 | stacki--; | |
24099 | break; | |
24100 | ||
24101 | case DW_OP_deref: | |
24102 | /* If we're not the last op, then we definitely can't encode | |
24103 | this using GDB's address_class enum. This is valid for partial | |
24104 | global symbols, although the variable's address will be bogus | |
24105 | in the psymtab. */ | |
24106 | if (i < size) | |
24107 | dwarf2_complex_location_expr_complaint (); | |
24108 | break; | |
24109 | ||
24110 | case DW_OP_GNU_push_tls_address: | |
4aa4e28b | 24111 | case DW_OP_form_tls_address: |
21ae7a4d JK |
24112 | /* The top of the stack has the offset from the beginning |
24113 | of the thread control block at which the variable is located. */ | |
24114 | /* Nothing should follow this operator, so the top of stack would | |
24115 | be returned. */ | |
24116 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
24117 | address will be bogus in the psymtab. Make it always at least |
24118 | non-zero to not look as a variable garbage collected by linker | |
24119 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
24120 | if (i < size) |
24121 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 24122 | stack[stacki]++; |
21ae7a4d JK |
24123 | break; |
24124 | ||
24125 | case DW_OP_GNU_uninit: | |
24126 | break; | |
24127 | ||
336d760d | 24128 | case DW_OP_addrx: |
3019eac3 | 24129 | case DW_OP_GNU_addr_index: |
49f6c839 | 24130 | case DW_OP_GNU_const_index: |
3019eac3 DE |
24131 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
24132 | &bytes_read); | |
24133 | i += bytes_read; | |
24134 | break; | |
24135 | ||
21ae7a4d JK |
24136 | default: |
24137 | { | |
f39c6ffd | 24138 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
24139 | |
24140 | if (name) | |
b98664d3 | 24141 | complaint (_("unsupported stack op: '%s'"), |
21ae7a4d JK |
24142 | name); |
24143 | else | |
b98664d3 | 24144 | complaint (_("unsupported stack op: '%02x'"), |
21ae7a4d JK |
24145 | op); |
24146 | } | |
24147 | ||
24148 | return (stack[stacki]); | |
d53d4ac5 | 24149 | } |
3c6e0cb3 | 24150 | |
21ae7a4d JK |
24151 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
24152 | outside of the allocated space. Also enforce minimum>0. */ | |
24153 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
24154 | { | |
b98664d3 | 24155 | complaint (_("location description stack overflow")); |
21ae7a4d JK |
24156 | return 0; |
24157 | } | |
24158 | ||
24159 | if (stacki <= 0) | |
24160 | { | |
b98664d3 | 24161 | complaint (_("location description stack underflow")); |
21ae7a4d JK |
24162 | return 0; |
24163 | } | |
24164 | } | |
24165 | return (stack[stacki]); | |
c906108c SS |
24166 | } |
24167 | ||
24168 | /* memory allocation interface */ | |
24169 | ||
c906108c | 24170 | static struct dwarf_block * |
7b5a2f43 | 24171 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c | 24172 | { |
8d749320 | 24173 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
c906108c SS |
24174 | } |
24175 | ||
c906108c | 24176 | static struct die_info * |
b60c80d6 | 24177 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
24178 | { |
24179 | struct die_info *die; | |
b60c80d6 DJ |
24180 | size_t size = sizeof (struct die_info); |
24181 | ||
24182 | if (num_attrs > 1) | |
24183 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 24184 | |
b60c80d6 | 24185 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
24186 | memset (die, 0, sizeof (struct die_info)); |
24187 | return (die); | |
24188 | } | |
2e276125 JB |
24189 | |
24190 | \f | |
24191 | /* Macro support. */ | |
24192 | ||
233d95b5 JK |
24193 | /* Return file name relative to the compilation directory of file number I in |
24194 | *LH's file name table. The result is allocated using xmalloc; the caller is | |
2e276125 | 24195 | responsible for freeing it. */ |
233d95b5 | 24196 | |
2e276125 | 24197 | static char * |
233d95b5 | 24198 | file_file_name (int file, struct line_header *lh) |
2e276125 | 24199 | { |
6a83a1e6 EZ |
24200 | /* Is the file number a valid index into the line header's file name |
24201 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 24202 | if (1 <= file && file <= lh->file_names.size ()) |
6a83a1e6 | 24203 | { |
8c43009f | 24204 | const file_entry &fe = lh->file_names[file - 1]; |
6e70227d | 24205 | |
8c43009f PA |
24206 | if (!IS_ABSOLUTE_PATH (fe.name)) |
24207 | { | |
24208 | const char *dir = fe.include_dir (lh); | |
24209 | if (dir != NULL) | |
24210 | return concat (dir, SLASH_STRING, fe.name, (char *) NULL); | |
24211 | } | |
24212 | return xstrdup (fe.name); | |
6a83a1e6 | 24213 | } |
2e276125 JB |
24214 | else |
24215 | { | |
6a83a1e6 EZ |
24216 | /* The compiler produced a bogus file number. We can at least |
24217 | record the macro definitions made in the file, even if we | |
24218 | won't be able to find the file by name. */ | |
24219 | char fake_name[80]; | |
9a619af0 | 24220 | |
8c042590 PM |
24221 | xsnprintf (fake_name, sizeof (fake_name), |
24222 | "<bad macro file number %d>", file); | |
2e276125 | 24223 | |
b98664d3 | 24224 | complaint (_("bad file number in macro information (%d)"), |
6a83a1e6 | 24225 | file); |
2e276125 | 24226 | |
6a83a1e6 | 24227 | return xstrdup (fake_name); |
2e276125 JB |
24228 | } |
24229 | } | |
24230 | ||
233d95b5 JK |
24231 | /* Return the full name of file number I in *LH's file name table. |
24232 | Use COMP_DIR as the name of the current directory of the | |
24233 | compilation. The result is allocated using xmalloc; the caller is | |
24234 | responsible for freeing it. */ | |
24235 | static char * | |
24236 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
24237 | { | |
24238 | /* Is the file number a valid index into the line header's file name | |
24239 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 24240 | if (1 <= file && file <= lh->file_names.size ()) |
233d95b5 JK |
24241 | { |
24242 | char *relative = file_file_name (file, lh); | |
24243 | ||
24244 | if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL) | |
24245 | return relative; | |
b36cec19 PA |
24246 | return reconcat (relative, comp_dir, SLASH_STRING, |
24247 | relative, (char *) NULL); | |
233d95b5 JK |
24248 | } |
24249 | else | |
24250 | return file_file_name (file, lh); | |
24251 | } | |
24252 | ||
2e276125 JB |
24253 | |
24254 | static struct macro_source_file * | |
804d2729 TT |
24255 | macro_start_file (struct dwarf2_cu *cu, |
24256 | int file, int line, | |
2e276125 | 24257 | struct macro_source_file *current_file, |
43f3e411 | 24258 | struct line_header *lh) |
2e276125 | 24259 | { |
233d95b5 JK |
24260 | /* File name relative to the compilation directory of this source file. */ |
24261 | char *file_name = file_file_name (file, lh); | |
2e276125 | 24262 | |
2e276125 | 24263 | if (! current_file) |
abc9d0dc | 24264 | { |
fc474241 DE |
24265 | /* Note: We don't create a macro table for this compilation unit |
24266 | at all until we actually get a filename. */ | |
c24bdb02 | 24267 | struct macro_table *macro_table = cu->get_builder ()->get_macro_table (); |
fc474241 | 24268 | |
abc9d0dc TT |
24269 | /* If we have no current file, then this must be the start_file |
24270 | directive for the compilation unit's main source file. */ | |
fc474241 DE |
24271 | current_file = macro_set_main (macro_table, file_name); |
24272 | macro_define_special (macro_table); | |
abc9d0dc | 24273 | } |
2e276125 | 24274 | else |
233d95b5 | 24275 | current_file = macro_include (current_file, line, file_name); |
2e276125 | 24276 | |
233d95b5 | 24277 | xfree (file_name); |
6e70227d | 24278 | |
2e276125 JB |
24279 | return current_file; |
24280 | } | |
24281 | ||
2e276125 JB |
24282 | static const char * |
24283 | consume_improper_spaces (const char *p, const char *body) | |
24284 | { | |
24285 | if (*p == ' ') | |
24286 | { | |
b98664d3 | 24287 | complaint (_("macro definition contains spaces " |
3e43a32a | 24288 | "in formal argument list:\n`%s'"), |
4d3c2250 | 24289 | body); |
2e276125 JB |
24290 | |
24291 | while (*p == ' ') | |
24292 | p++; | |
24293 | } | |
24294 | ||
24295 | return p; | |
24296 | } | |
24297 | ||
24298 | ||
24299 | static void | |
24300 | parse_macro_definition (struct macro_source_file *file, int line, | |
24301 | const char *body) | |
24302 | { | |
24303 | const char *p; | |
24304 | ||
24305 | /* The body string takes one of two forms. For object-like macro | |
24306 | definitions, it should be: | |
24307 | ||
24308 | <macro name> " " <definition> | |
24309 | ||
24310 | For function-like macro definitions, it should be: | |
24311 | ||
24312 | <macro name> "() " <definition> | |
24313 | or | |
24314 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
24315 | ||
24316 | Spaces may appear only where explicitly indicated, and in the | |
24317 | <definition>. | |
24318 | ||
24319 | The Dwarf 2 spec says that an object-like macro's name is always | |
24320 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 24321 | the space when the macro's definition is the empty string. |
2e276125 JB |
24322 | |
24323 | The Dwarf 2 spec says that there should be no spaces between the | |
24324 | formal arguments in a function-like macro's formal argument list, | |
24325 | but versions of GCC around March 2002 include spaces after the | |
24326 | commas. */ | |
24327 | ||
24328 | ||
24329 | /* Find the extent of the macro name. The macro name is terminated | |
24330 | by either a space or null character (for an object-like macro) or | |
24331 | an opening paren (for a function-like macro). */ | |
24332 | for (p = body; *p; p++) | |
24333 | if (*p == ' ' || *p == '(') | |
24334 | break; | |
24335 | ||
24336 | if (*p == ' ' || *p == '\0') | |
24337 | { | |
24338 | /* It's an object-like macro. */ | |
24339 | int name_len = p - body; | |
3f8a7804 | 24340 | char *name = savestring (body, name_len); |
2e276125 JB |
24341 | const char *replacement; |
24342 | ||
24343 | if (*p == ' ') | |
24344 | replacement = body + name_len + 1; | |
24345 | else | |
24346 | { | |
4d3c2250 | 24347 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
24348 | replacement = body + name_len; |
24349 | } | |
6e70227d | 24350 | |
2e276125 JB |
24351 | macro_define_object (file, line, name, replacement); |
24352 | ||
24353 | xfree (name); | |
24354 | } | |
24355 | else if (*p == '(') | |
24356 | { | |
24357 | /* It's a function-like macro. */ | |
3f8a7804 | 24358 | char *name = savestring (body, p - body); |
2e276125 JB |
24359 | int argc = 0; |
24360 | int argv_size = 1; | |
8d749320 | 24361 | char **argv = XNEWVEC (char *, argv_size); |
2e276125 JB |
24362 | |
24363 | p++; | |
24364 | ||
24365 | p = consume_improper_spaces (p, body); | |
24366 | ||
24367 | /* Parse the formal argument list. */ | |
24368 | while (*p && *p != ')') | |
24369 | { | |
24370 | /* Find the extent of the current argument name. */ | |
24371 | const char *arg_start = p; | |
24372 | ||
24373 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
24374 | p++; | |
24375 | ||
24376 | if (! *p || p == arg_start) | |
4d3c2250 | 24377 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
24378 | else |
24379 | { | |
24380 | /* Make sure argv has room for the new argument. */ | |
24381 | if (argc >= argv_size) | |
24382 | { | |
24383 | argv_size *= 2; | |
224c3ddb | 24384 | argv = XRESIZEVEC (char *, argv, argv_size); |
2e276125 JB |
24385 | } |
24386 | ||
3f8a7804 | 24387 | argv[argc++] = savestring (arg_start, p - arg_start); |
2e276125 JB |
24388 | } |
24389 | ||
24390 | p = consume_improper_spaces (p, body); | |
24391 | ||
24392 | /* Consume the comma, if present. */ | |
24393 | if (*p == ',') | |
24394 | { | |
24395 | p++; | |
24396 | ||
24397 | p = consume_improper_spaces (p, body); | |
24398 | } | |
24399 | } | |
24400 | ||
24401 | if (*p == ')') | |
24402 | { | |
24403 | p++; | |
24404 | ||
24405 | if (*p == ' ') | |
24406 | /* Perfectly formed definition, no complaints. */ | |
24407 | macro_define_function (file, line, name, | |
6e70227d | 24408 | argc, (const char **) argv, |
2e276125 JB |
24409 | p + 1); |
24410 | else if (*p == '\0') | |
24411 | { | |
24412 | /* Complain, but do define it. */ | |
4d3c2250 | 24413 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 24414 | macro_define_function (file, line, name, |
6e70227d | 24415 | argc, (const char **) argv, |
2e276125 JB |
24416 | p); |
24417 | } | |
24418 | else | |
24419 | /* Just complain. */ | |
4d3c2250 | 24420 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
24421 | } |
24422 | else | |
24423 | /* Just complain. */ | |
4d3c2250 | 24424 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
24425 | |
24426 | xfree (name); | |
24427 | { | |
24428 | int i; | |
24429 | ||
24430 | for (i = 0; i < argc; i++) | |
24431 | xfree (argv[i]); | |
24432 | } | |
24433 | xfree (argv); | |
24434 | } | |
24435 | else | |
4d3c2250 | 24436 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
24437 | } |
24438 | ||
cf2c3c16 TT |
24439 | /* Skip some bytes from BYTES according to the form given in FORM. |
24440 | Returns the new pointer. */ | |
2e276125 | 24441 | |
d521ce57 TT |
24442 | static const gdb_byte * |
24443 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
24444 | enum dwarf_form form, |
24445 | unsigned int offset_size, | |
24446 | struct dwarf2_section_info *section) | |
2e276125 | 24447 | { |
cf2c3c16 | 24448 | unsigned int bytes_read; |
2e276125 | 24449 | |
cf2c3c16 | 24450 | switch (form) |
2e276125 | 24451 | { |
cf2c3c16 TT |
24452 | case DW_FORM_data1: |
24453 | case DW_FORM_flag: | |
24454 | ++bytes; | |
24455 | break; | |
24456 | ||
24457 | case DW_FORM_data2: | |
24458 | bytes += 2; | |
24459 | break; | |
24460 | ||
24461 | case DW_FORM_data4: | |
24462 | bytes += 4; | |
24463 | break; | |
24464 | ||
24465 | case DW_FORM_data8: | |
24466 | bytes += 8; | |
24467 | break; | |
24468 | ||
0224619f JK |
24469 | case DW_FORM_data16: |
24470 | bytes += 16; | |
24471 | break; | |
24472 | ||
cf2c3c16 TT |
24473 | case DW_FORM_string: |
24474 | read_direct_string (abfd, bytes, &bytes_read); | |
24475 | bytes += bytes_read; | |
24476 | break; | |
24477 | ||
24478 | case DW_FORM_sec_offset: | |
24479 | case DW_FORM_strp: | |
36586728 | 24480 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
24481 | bytes += offset_size; |
24482 | break; | |
24483 | ||
24484 | case DW_FORM_block: | |
24485 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
24486 | bytes += bytes_read; | |
24487 | break; | |
24488 | ||
24489 | case DW_FORM_block1: | |
24490 | bytes += 1 + read_1_byte (abfd, bytes); | |
24491 | break; | |
24492 | case DW_FORM_block2: | |
24493 | bytes += 2 + read_2_bytes (abfd, bytes); | |
24494 | break; | |
24495 | case DW_FORM_block4: | |
24496 | bytes += 4 + read_4_bytes (abfd, bytes); | |
24497 | break; | |
24498 | ||
336d760d | 24499 | case DW_FORM_addrx: |
cf2c3c16 | 24500 | case DW_FORM_sdata: |
cf532bd1 | 24501 | case DW_FORM_strx: |
cf2c3c16 | 24502 | case DW_FORM_udata: |
3019eac3 DE |
24503 | case DW_FORM_GNU_addr_index: |
24504 | case DW_FORM_GNU_str_index: | |
d521ce57 | 24505 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
24506 | if (bytes == NULL) |
24507 | { | |
24508 | dwarf2_section_buffer_overflow_complaint (section); | |
24509 | return NULL; | |
24510 | } | |
cf2c3c16 TT |
24511 | break; |
24512 | ||
663c44ac JK |
24513 | case DW_FORM_implicit_const: |
24514 | break; | |
24515 | ||
cf2c3c16 TT |
24516 | default: |
24517 | { | |
b98664d3 | 24518 | complaint (_("invalid form 0x%x in `%s'"), |
a32a8923 | 24519 | form, get_section_name (section)); |
cf2c3c16 TT |
24520 | return NULL; |
24521 | } | |
2e276125 JB |
24522 | } |
24523 | ||
cf2c3c16 TT |
24524 | return bytes; |
24525 | } | |
757a13d0 | 24526 | |
cf2c3c16 TT |
24527 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
24528 | opcode. Returns an updated pointer to the macro data buffer; or, | |
24529 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 24530 | |
d521ce57 | 24531 | static const gdb_byte * |
cf2c3c16 | 24532 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
24533 | const gdb_byte **opcode_definitions, |
24534 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
24535 | bfd *abfd, |
24536 | unsigned int offset_size, | |
24537 | struct dwarf2_section_info *section) | |
24538 | { | |
24539 | unsigned int bytes_read, i; | |
24540 | unsigned long arg; | |
d521ce57 | 24541 | const gdb_byte *defn; |
2e276125 | 24542 | |
cf2c3c16 | 24543 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 24544 | { |
b98664d3 | 24545 | complaint (_("unrecognized DW_MACFINO opcode 0x%x"), |
cf2c3c16 TT |
24546 | opcode); |
24547 | return NULL; | |
24548 | } | |
2e276125 | 24549 | |
cf2c3c16 TT |
24550 | defn = opcode_definitions[opcode]; |
24551 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
24552 | defn += bytes_read; | |
2e276125 | 24553 | |
cf2c3c16 TT |
24554 | for (i = 0; i < arg; ++i) |
24555 | { | |
aead7601 SM |
24556 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, |
24557 | (enum dwarf_form) defn[i], offset_size, | |
f664829e | 24558 | section); |
cf2c3c16 TT |
24559 | if (mac_ptr == NULL) |
24560 | { | |
24561 | /* skip_form_bytes already issued the complaint. */ | |
24562 | return NULL; | |
24563 | } | |
24564 | } | |
757a13d0 | 24565 | |
cf2c3c16 TT |
24566 | return mac_ptr; |
24567 | } | |
757a13d0 | 24568 | |
cf2c3c16 TT |
24569 | /* A helper function which parses the header of a macro section. |
24570 | If the macro section is the extended (for now called "GNU") type, | |
24571 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
24572 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 24573 | |
d521ce57 TT |
24574 | static const gdb_byte * |
24575 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 24576 | bfd *abfd, |
d521ce57 | 24577 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
24578 | unsigned int *offset_size, |
24579 | int section_is_gnu) | |
24580 | { | |
24581 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 24582 | |
cf2c3c16 TT |
24583 | if (section_is_gnu) |
24584 | { | |
24585 | unsigned int version, flags; | |
757a13d0 | 24586 | |
cf2c3c16 | 24587 | version = read_2_bytes (abfd, mac_ptr); |
0af92d60 | 24588 | if (version != 4 && version != 5) |
cf2c3c16 | 24589 | { |
b98664d3 | 24590 | complaint (_("unrecognized version `%d' in .debug_macro section"), |
cf2c3c16 TT |
24591 | version); |
24592 | return NULL; | |
24593 | } | |
24594 | mac_ptr += 2; | |
757a13d0 | 24595 | |
cf2c3c16 TT |
24596 | flags = read_1_byte (abfd, mac_ptr); |
24597 | ++mac_ptr; | |
24598 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 24599 | |
cf2c3c16 TT |
24600 | if ((flags & 2) != 0) |
24601 | /* We don't need the line table offset. */ | |
24602 | mac_ptr += *offset_size; | |
757a13d0 | 24603 | |
cf2c3c16 TT |
24604 | /* Vendor opcode descriptions. */ |
24605 | if ((flags & 4) != 0) | |
24606 | { | |
24607 | unsigned int i, count; | |
757a13d0 | 24608 | |
cf2c3c16 TT |
24609 | count = read_1_byte (abfd, mac_ptr); |
24610 | ++mac_ptr; | |
24611 | for (i = 0; i < count; ++i) | |
24612 | { | |
24613 | unsigned int opcode, bytes_read; | |
24614 | unsigned long arg; | |
24615 | ||
24616 | opcode = read_1_byte (abfd, mac_ptr); | |
24617 | ++mac_ptr; | |
24618 | opcode_definitions[opcode] = mac_ptr; | |
24619 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24620 | mac_ptr += bytes_read; | |
24621 | mac_ptr += arg; | |
24622 | } | |
757a13d0 | 24623 | } |
cf2c3c16 | 24624 | } |
757a13d0 | 24625 | |
cf2c3c16 TT |
24626 | return mac_ptr; |
24627 | } | |
757a13d0 | 24628 | |
cf2c3c16 | 24629 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
0af92d60 | 24630 | including DW_MACRO_import. */ |
cf2c3c16 TT |
24631 | |
24632 | static void | |
804d2729 | 24633 | dwarf_decode_macro_bytes (struct dwarf2_cu *cu, |
ed2dc618 | 24634 | bfd *abfd, |
d521ce57 | 24635 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, |
cf2c3c16 | 24636 | struct macro_source_file *current_file, |
43f3e411 | 24637 | struct line_header *lh, |
cf2c3c16 | 24638 | struct dwarf2_section_info *section, |
36586728 | 24639 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 24640 | unsigned int offset_size, |
8fc3fc34 | 24641 | htab_t include_hash) |
cf2c3c16 | 24642 | { |
804d2729 TT |
24643 | struct dwarf2_per_objfile *dwarf2_per_objfile |
24644 | = cu->per_cu->dwarf2_per_objfile; | |
4d663531 | 24645 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
cf2c3c16 TT |
24646 | enum dwarf_macro_record_type macinfo_type; |
24647 | int at_commandline; | |
d521ce57 | 24648 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 24649 | |
cf2c3c16 TT |
24650 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
24651 | &offset_size, section_is_gnu); | |
24652 | if (mac_ptr == NULL) | |
24653 | { | |
24654 | /* We already issued a complaint. */ | |
24655 | return; | |
24656 | } | |
757a13d0 JK |
24657 | |
24658 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
24659 | GDB is still reading the definitions from command line. First | |
24660 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
24661 | to create CURRENT_FILE for the main source holding also the command line | |
24662 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
24663 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
24664 | ||
24665 | at_commandline = 1; | |
24666 | ||
24667 | do | |
24668 | { | |
24669 | /* Do we at least have room for a macinfo type byte? */ | |
24670 | if (mac_ptr >= mac_end) | |
24671 | { | |
f664829e | 24672 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
24673 | break; |
24674 | } | |
24675 | ||
aead7601 | 24676 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
757a13d0 JK |
24677 | mac_ptr++; |
24678 | ||
cf2c3c16 TT |
24679 | /* Note that we rely on the fact that the corresponding GNU and |
24680 | DWARF constants are the same. */ | |
132448f8 SM |
24681 | DIAGNOSTIC_PUSH |
24682 | DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES | |
757a13d0 JK |
24683 | switch (macinfo_type) |
24684 | { | |
24685 | /* A zero macinfo type indicates the end of the macro | |
24686 | information. */ | |
24687 | case 0: | |
24688 | break; | |
2e276125 | 24689 | |
0af92d60 JK |
24690 | case DW_MACRO_define: |
24691 | case DW_MACRO_undef: | |
24692 | case DW_MACRO_define_strp: | |
24693 | case DW_MACRO_undef_strp: | |
24694 | case DW_MACRO_define_sup: | |
24695 | case DW_MACRO_undef_sup: | |
2e276125 | 24696 | { |
891d2f0b | 24697 | unsigned int bytes_read; |
2e276125 | 24698 | int line; |
d521ce57 | 24699 | const char *body; |
cf2c3c16 | 24700 | int is_define; |
2e276125 | 24701 | |
cf2c3c16 TT |
24702 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
24703 | mac_ptr += bytes_read; | |
24704 | ||
0af92d60 JK |
24705 | if (macinfo_type == DW_MACRO_define |
24706 | || macinfo_type == DW_MACRO_undef) | |
cf2c3c16 TT |
24707 | { |
24708 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
24709 | mac_ptr += bytes_read; | |
24710 | } | |
24711 | else | |
24712 | { | |
24713 | LONGEST str_offset; | |
24714 | ||
24715 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
24716 | mac_ptr += offset_size; | |
2e276125 | 24717 | |
0af92d60 JK |
24718 | if (macinfo_type == DW_MACRO_define_sup |
24719 | || macinfo_type == DW_MACRO_undef_sup | |
f7a35f02 | 24720 | || section_is_dwz) |
36586728 | 24721 | { |
ed2dc618 SM |
24722 | struct dwz_file *dwz |
24723 | = dwarf2_get_dwz_file (dwarf2_per_objfile); | |
36586728 | 24724 | |
ed2dc618 SM |
24725 | body = read_indirect_string_from_dwz (objfile, |
24726 | dwz, str_offset); | |
36586728 TT |
24727 | } |
24728 | else | |
ed2dc618 SM |
24729 | body = read_indirect_string_at_offset (dwarf2_per_objfile, |
24730 | abfd, str_offset); | |
cf2c3c16 TT |
24731 | } |
24732 | ||
0af92d60 JK |
24733 | is_define = (macinfo_type == DW_MACRO_define |
24734 | || macinfo_type == DW_MACRO_define_strp | |
24735 | || macinfo_type == DW_MACRO_define_sup); | |
2e276125 | 24736 | if (! current_file) |
757a13d0 JK |
24737 | { |
24738 | /* DWARF violation as no main source is present. */ | |
b98664d3 | 24739 | complaint (_("debug info with no main source gives macro %s " |
757a13d0 | 24740 | "on line %d: %s"), |
cf2c3c16 TT |
24741 | is_define ? _("definition") : _("undefinition"), |
24742 | line, body); | |
757a13d0 JK |
24743 | break; |
24744 | } | |
3e43a32a MS |
24745 | if ((line == 0 && !at_commandline) |
24746 | || (line != 0 && at_commandline)) | |
b98664d3 | 24747 | complaint (_("debug info gives %s macro %s with %s line %d: %s"), |
757a13d0 | 24748 | at_commandline ? _("command-line") : _("in-file"), |
cf2c3c16 | 24749 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
24750 | line == 0 ? _("zero") : _("non-zero"), line, body); |
24751 | ||
955b06fa | 24752 | if (body == NULL) |
7bede828 | 24753 | { |
955b06fa SDJ |
24754 | /* Fedora's rpm-build's "debugedit" binary |
24755 | corrupted .debug_macro sections. | |
24756 | ||
24757 | For more info, see | |
24758 | https://bugzilla.redhat.com/show_bug.cgi?id=1708786 */ | |
24759 | complaint (_("debug info gives %s invalid macro %s " | |
24760 | "without body (corrupted?) at line %d " | |
24761 | "on file %s"), | |
24762 | at_commandline ? _("command-line") : _("in-file"), | |
24763 | is_define ? _("definition") : _("undefinition"), | |
24764 | line, current_file->filename); | |
7bede828 | 24765 | } |
955b06fa SDJ |
24766 | else if (is_define) |
24767 | parse_macro_definition (current_file, line, body); | |
cf2c3c16 TT |
24768 | else |
24769 | { | |
0af92d60 JK |
24770 | gdb_assert (macinfo_type == DW_MACRO_undef |
24771 | || macinfo_type == DW_MACRO_undef_strp | |
24772 | || macinfo_type == DW_MACRO_undef_sup); | |
cf2c3c16 TT |
24773 | macro_undef (current_file, line, body); |
24774 | } | |
2e276125 JB |
24775 | } |
24776 | break; | |
24777 | ||
0af92d60 | 24778 | case DW_MACRO_start_file: |
2e276125 | 24779 | { |
891d2f0b | 24780 | unsigned int bytes_read; |
2e276125 JB |
24781 | int line, file; |
24782 | ||
24783 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24784 | mac_ptr += bytes_read; | |
24785 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24786 | mac_ptr += bytes_read; | |
24787 | ||
3e43a32a MS |
24788 | if ((line == 0 && !at_commandline) |
24789 | || (line != 0 && at_commandline)) | |
b98664d3 | 24790 | complaint (_("debug info gives source %d included " |
757a13d0 JK |
24791 | "from %s at %s line %d"), |
24792 | file, at_commandline ? _("command-line") : _("file"), | |
24793 | line == 0 ? _("zero") : _("non-zero"), line); | |
24794 | ||
24795 | if (at_commandline) | |
24796 | { | |
0af92d60 | 24797 | /* This DW_MACRO_start_file was executed in the |
cf2c3c16 | 24798 | pass one. */ |
757a13d0 JK |
24799 | at_commandline = 0; |
24800 | } | |
24801 | else | |
804d2729 TT |
24802 | current_file = macro_start_file (cu, file, line, current_file, |
24803 | lh); | |
2e276125 JB |
24804 | } |
24805 | break; | |
24806 | ||
0af92d60 | 24807 | case DW_MACRO_end_file: |
2e276125 | 24808 | if (! current_file) |
b98664d3 | 24809 | complaint (_("macro debug info has an unmatched " |
3e43a32a | 24810 | "`close_file' directive")); |
2e276125 JB |
24811 | else |
24812 | { | |
24813 | current_file = current_file->included_by; | |
24814 | if (! current_file) | |
24815 | { | |
cf2c3c16 | 24816 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
24817 | |
24818 | /* GCC circa March 2002 doesn't produce the zero | |
24819 | type byte marking the end of the compilation | |
24820 | unit. Complain if it's not there, but exit no | |
24821 | matter what. */ | |
24822 | ||
24823 | /* Do we at least have room for a macinfo type byte? */ | |
24824 | if (mac_ptr >= mac_end) | |
24825 | { | |
f664829e | 24826 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
24827 | return; |
24828 | } | |
24829 | ||
24830 | /* We don't increment mac_ptr here, so this is just | |
24831 | a look-ahead. */ | |
aead7601 SM |
24832 | next_type |
24833 | = (enum dwarf_macro_record_type) read_1_byte (abfd, | |
24834 | mac_ptr); | |
2e276125 | 24835 | if (next_type != 0) |
b98664d3 | 24836 | complaint (_("no terminating 0-type entry for " |
3e43a32a | 24837 | "macros in `.debug_macinfo' section")); |
2e276125 JB |
24838 | |
24839 | return; | |
24840 | } | |
24841 | } | |
24842 | break; | |
24843 | ||
0af92d60 JK |
24844 | case DW_MACRO_import: |
24845 | case DW_MACRO_import_sup: | |
cf2c3c16 TT |
24846 | { |
24847 | LONGEST offset; | |
8fc3fc34 | 24848 | void **slot; |
a036ba48 TT |
24849 | bfd *include_bfd = abfd; |
24850 | struct dwarf2_section_info *include_section = section; | |
d521ce57 | 24851 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 24852 | int is_dwz = section_is_dwz; |
d521ce57 | 24853 | const gdb_byte *new_mac_ptr; |
cf2c3c16 TT |
24854 | |
24855 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
24856 | mac_ptr += offset_size; | |
24857 | ||
0af92d60 | 24858 | if (macinfo_type == DW_MACRO_import_sup) |
a036ba48 | 24859 | { |
ed2dc618 | 24860 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
a036ba48 | 24861 | |
4d663531 | 24862 | dwarf2_read_section (objfile, &dwz->macro); |
a036ba48 | 24863 | |
a036ba48 | 24864 | include_section = &dwz->macro; |
a32a8923 | 24865 | include_bfd = get_section_bfd_owner (include_section); |
a036ba48 TT |
24866 | include_mac_end = dwz->macro.buffer + dwz->macro.size; |
24867 | is_dwz = 1; | |
24868 | } | |
24869 | ||
24870 | new_mac_ptr = include_section->buffer + offset; | |
24871 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
24872 | ||
8fc3fc34 TT |
24873 | if (*slot != NULL) |
24874 | { | |
24875 | /* This has actually happened; see | |
24876 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
b98664d3 | 24877 | complaint (_("recursive DW_MACRO_import in " |
8fc3fc34 TT |
24878 | ".debug_macro section")); |
24879 | } | |
24880 | else | |
24881 | { | |
d521ce57 | 24882 | *slot = (void *) new_mac_ptr; |
36586728 | 24883 | |
804d2729 | 24884 | dwarf_decode_macro_bytes (cu, include_bfd, new_mac_ptr, |
43f3e411 | 24885 | include_mac_end, current_file, lh, |
36586728 | 24886 | section, section_is_gnu, is_dwz, |
4d663531 | 24887 | offset_size, include_hash); |
8fc3fc34 | 24888 | |
d521ce57 | 24889 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 24890 | } |
cf2c3c16 TT |
24891 | } |
24892 | break; | |
24893 | ||
2e276125 | 24894 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
24895 | if (!section_is_gnu) |
24896 | { | |
24897 | unsigned int bytes_read; | |
2e276125 | 24898 | |
ac298888 TT |
24899 | /* This reads the constant, but since we don't recognize |
24900 | any vendor extensions, we ignore it. */ | |
24901 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
cf2c3c16 TT |
24902 | mac_ptr += bytes_read; |
24903 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
24904 | mac_ptr += bytes_read; | |
2e276125 | 24905 | |
cf2c3c16 TT |
24906 | /* We don't recognize any vendor extensions. */ |
24907 | break; | |
24908 | } | |
24909 | /* FALLTHROUGH */ | |
24910 | ||
24911 | default: | |
24912 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 24913 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
24914 | section); |
24915 | if (mac_ptr == NULL) | |
24916 | return; | |
24917 | break; | |
2e276125 | 24918 | } |
132448f8 | 24919 | DIAGNOSTIC_POP |
757a13d0 | 24920 | } while (macinfo_type != 0); |
2e276125 | 24921 | } |
8e19ed76 | 24922 | |
cf2c3c16 | 24923 | static void |
09262596 | 24924 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
43f3e411 | 24925 | int section_is_gnu) |
cf2c3c16 | 24926 | { |
518817b3 SM |
24927 | struct dwarf2_per_objfile *dwarf2_per_objfile |
24928 | = cu->per_cu->dwarf2_per_objfile; | |
bb5ed363 | 24929 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
24930 | struct line_header *lh = cu->line_header; |
24931 | bfd *abfd; | |
d521ce57 | 24932 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
24933 | struct macro_source_file *current_file = 0; |
24934 | enum dwarf_macro_record_type macinfo_type; | |
24935 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 24936 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 | 24937 | void **slot; |
09262596 DE |
24938 | struct dwarf2_section_info *section; |
24939 | const char *section_name; | |
24940 | ||
24941 | if (cu->dwo_unit != NULL) | |
24942 | { | |
24943 | if (section_is_gnu) | |
24944 | { | |
24945 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
24946 | section_name = ".debug_macro.dwo"; | |
24947 | } | |
24948 | else | |
24949 | { | |
24950 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
24951 | section_name = ".debug_macinfo.dwo"; | |
24952 | } | |
24953 | } | |
24954 | else | |
24955 | { | |
24956 | if (section_is_gnu) | |
24957 | { | |
24958 | section = &dwarf2_per_objfile->macro; | |
24959 | section_name = ".debug_macro"; | |
24960 | } | |
24961 | else | |
24962 | { | |
24963 | section = &dwarf2_per_objfile->macinfo; | |
24964 | section_name = ".debug_macinfo"; | |
24965 | } | |
24966 | } | |
cf2c3c16 | 24967 | |
bb5ed363 | 24968 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
24969 | if (section->buffer == NULL) |
24970 | { | |
b98664d3 | 24971 | complaint (_("missing %s section"), section_name); |
cf2c3c16 TT |
24972 | return; |
24973 | } | |
a32a8923 | 24974 | abfd = get_section_bfd_owner (section); |
cf2c3c16 TT |
24975 | |
24976 | /* First pass: Find the name of the base filename. | |
24977 | This filename is needed in order to process all macros whose definition | |
24978 | (or undefinition) comes from the command line. These macros are defined | |
24979 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
24980 | associated to the base file. | |
24981 | ||
24982 | To determine the base file name, we scan the macro definitions until we | |
24983 | reach the first DW_MACINFO_start_file entry. We then initialize | |
24984 | CURRENT_FILE accordingly so that any macro definition found before the | |
24985 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
24986 | ||
24987 | mac_ptr = section->buffer + offset; | |
24988 | mac_end = section->buffer + section->size; | |
24989 | ||
24990 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
24991 | &offset_size, section_is_gnu); | |
24992 | if (mac_ptr == NULL) | |
24993 | { | |
24994 | /* We already issued a complaint. */ | |
24995 | return; | |
24996 | } | |
24997 | ||
24998 | do | |
24999 | { | |
25000 | /* Do we at least have room for a macinfo type byte? */ | |
25001 | if (mac_ptr >= mac_end) | |
25002 | { | |
25003 | /* Complaint is printed during the second pass as GDB will probably | |
25004 | stop the first pass earlier upon finding | |
25005 | DW_MACINFO_start_file. */ | |
25006 | break; | |
25007 | } | |
25008 | ||
aead7601 | 25009 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
cf2c3c16 TT |
25010 | mac_ptr++; |
25011 | ||
25012 | /* Note that we rely on the fact that the corresponding GNU and | |
25013 | DWARF constants are the same. */ | |
132448f8 SM |
25014 | DIAGNOSTIC_PUSH |
25015 | DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES | |
cf2c3c16 TT |
25016 | switch (macinfo_type) |
25017 | { | |
25018 | /* A zero macinfo type indicates the end of the macro | |
25019 | information. */ | |
25020 | case 0: | |
25021 | break; | |
25022 | ||
0af92d60 JK |
25023 | case DW_MACRO_define: |
25024 | case DW_MACRO_undef: | |
cf2c3c16 TT |
25025 | /* Only skip the data by MAC_PTR. */ |
25026 | { | |
25027 | unsigned int bytes_read; | |
25028 | ||
25029 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
25030 | mac_ptr += bytes_read; | |
25031 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
25032 | mac_ptr += bytes_read; | |
25033 | } | |
25034 | break; | |
25035 | ||
0af92d60 | 25036 | case DW_MACRO_start_file: |
cf2c3c16 TT |
25037 | { |
25038 | unsigned int bytes_read; | |
25039 | int line, file; | |
25040 | ||
25041 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
25042 | mac_ptr += bytes_read; | |
25043 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
25044 | mac_ptr += bytes_read; | |
25045 | ||
804d2729 | 25046 | current_file = macro_start_file (cu, file, line, current_file, lh); |
cf2c3c16 TT |
25047 | } |
25048 | break; | |
25049 | ||
0af92d60 | 25050 | case DW_MACRO_end_file: |
cf2c3c16 TT |
25051 | /* No data to skip by MAC_PTR. */ |
25052 | break; | |
25053 | ||
0af92d60 JK |
25054 | case DW_MACRO_define_strp: |
25055 | case DW_MACRO_undef_strp: | |
25056 | case DW_MACRO_define_sup: | |
25057 | case DW_MACRO_undef_sup: | |
cf2c3c16 TT |
25058 | { |
25059 | unsigned int bytes_read; | |
25060 | ||
25061 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
25062 | mac_ptr += bytes_read; | |
25063 | mac_ptr += offset_size; | |
25064 | } | |
25065 | break; | |
25066 | ||
0af92d60 JK |
25067 | case DW_MACRO_import: |
25068 | case DW_MACRO_import_sup: | |
cf2c3c16 | 25069 | /* Note that, according to the spec, a transparent include |
0af92d60 | 25070 | chain cannot call DW_MACRO_start_file. So, we can just |
cf2c3c16 TT |
25071 | skip this opcode. */ |
25072 | mac_ptr += offset_size; | |
25073 | break; | |
25074 | ||
25075 | case DW_MACINFO_vendor_ext: | |
25076 | /* Only skip the data by MAC_PTR. */ | |
25077 | if (!section_is_gnu) | |
25078 | { | |
25079 | unsigned int bytes_read; | |
25080 | ||
25081 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
25082 | mac_ptr += bytes_read; | |
25083 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
25084 | mac_ptr += bytes_read; | |
25085 | } | |
25086 | /* FALLTHROUGH */ | |
25087 | ||
25088 | default: | |
25089 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 25090 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
25091 | section); |
25092 | if (mac_ptr == NULL) | |
25093 | return; | |
25094 | break; | |
25095 | } | |
132448f8 | 25096 | DIAGNOSTIC_POP |
cf2c3c16 TT |
25097 | } while (macinfo_type != 0 && current_file == NULL); |
25098 | ||
25099 | /* Second pass: Process all entries. | |
25100 | ||
25101 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
25102 | command-line macro definitions/undefinitions. This flag is unset when we | |
25103 | reach the first DW_MACINFO_start_file entry. */ | |
25104 | ||
fc4007c9 TT |
25105 | htab_up include_hash (htab_create_alloc (1, htab_hash_pointer, |
25106 | htab_eq_pointer, | |
25107 | NULL, xcalloc, xfree)); | |
8fc3fc34 | 25108 | mac_ptr = section->buffer + offset; |
fc4007c9 | 25109 | slot = htab_find_slot (include_hash.get (), mac_ptr, INSERT); |
d521ce57 | 25110 | *slot = (void *) mac_ptr; |
804d2729 | 25111 | dwarf_decode_macro_bytes (cu, abfd, mac_ptr, mac_end, |
43f3e411 | 25112 | current_file, lh, section, |
fc4007c9 TT |
25113 | section_is_gnu, 0, offset_size, |
25114 | include_hash.get ()); | |
cf2c3c16 TT |
25115 | } |
25116 | ||
8e19ed76 | 25117 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 25118 | if so return true else false. */ |
380bca97 | 25119 | |
8e19ed76 | 25120 | static int |
6e5a29e1 | 25121 | attr_form_is_block (const struct attribute *attr) |
8e19ed76 PS |
25122 | { |
25123 | return (attr == NULL ? 0 : | |
25124 | attr->form == DW_FORM_block1 | |
25125 | || attr->form == DW_FORM_block2 | |
25126 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
25127 | || attr->form == DW_FORM_block |
25128 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 25129 | } |
4c2df51b | 25130 | |
c6a0999f JB |
25131 | /* Return non-zero if ATTR's value is a section offset --- classes |
25132 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
25133 | You may use DW_UNSND (attr) to retrieve such offsets. | |
25134 | ||
25135 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
25136 | may have a value that belongs to more than one of these classes; it | |
25137 | would be ambiguous if we did, because we use the same forms for all | |
25138 | of them. */ | |
380bca97 | 25139 | |
3690dd37 | 25140 | static int |
6e5a29e1 | 25141 | attr_form_is_section_offset (const struct attribute *attr) |
3690dd37 JB |
25142 | { |
25143 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
25144 | || attr->form == DW_FORM_data8 |
25145 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
25146 | } |
25147 | ||
3690dd37 JB |
25148 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
25149 | zero otherwise. When this function returns true, you can apply | |
25150 | dwarf2_get_attr_constant_value to it. | |
25151 | ||
25152 | However, note that for some attributes you must check | |
25153 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
25154 | and DW_FORM_data8 are members of both the constant class, and of | |
25155 | the classes that contain offsets into other debug sections | |
25156 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
25157 | that, if an attribute's can be either a constant or one of the | |
25158 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
0224619f JK |
25159 | taken as section offsets, not constants. |
25160 | ||
25161 | DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value | |
25162 | cannot handle that. */ | |
380bca97 | 25163 | |
3690dd37 | 25164 | static int |
6e5a29e1 | 25165 | attr_form_is_constant (const struct attribute *attr) |
3690dd37 JB |
25166 | { |
25167 | switch (attr->form) | |
25168 | { | |
25169 | case DW_FORM_sdata: | |
25170 | case DW_FORM_udata: | |
25171 | case DW_FORM_data1: | |
25172 | case DW_FORM_data2: | |
25173 | case DW_FORM_data4: | |
25174 | case DW_FORM_data8: | |
663c44ac | 25175 | case DW_FORM_implicit_const: |
3690dd37 JB |
25176 | return 1; |
25177 | default: | |
25178 | return 0; | |
25179 | } | |
25180 | } | |
25181 | ||
7771576e SA |
25182 | |
25183 | /* DW_ADDR is always stored already as sect_offset; despite for the forms | |
25184 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
25185 | ||
25186 | static int | |
6e5a29e1 | 25187 | attr_form_is_ref (const struct attribute *attr) |
7771576e SA |
25188 | { |
25189 | switch (attr->form) | |
25190 | { | |
25191 | case DW_FORM_ref_addr: | |
25192 | case DW_FORM_ref1: | |
25193 | case DW_FORM_ref2: | |
25194 | case DW_FORM_ref4: | |
25195 | case DW_FORM_ref8: | |
25196 | case DW_FORM_ref_udata: | |
25197 | case DW_FORM_GNU_ref_alt: | |
25198 | return 1; | |
25199 | default: | |
25200 | return 0; | |
25201 | } | |
25202 | } | |
25203 | ||
3019eac3 DE |
25204 | /* Return the .debug_loc section to use for CU. |
25205 | For DWO files use .debug_loc.dwo. */ | |
25206 | ||
25207 | static struct dwarf2_section_info * | |
25208 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
25209 | { | |
518817b3 SM |
25210 | struct dwarf2_per_objfile *dwarf2_per_objfile |
25211 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 25212 | |
3019eac3 | 25213 | if (cu->dwo_unit) |
43988095 JK |
25214 | { |
25215 | struct dwo_sections *sections = &cu->dwo_unit->dwo_file->sections; | |
5f48f8f3 | 25216 | |
43988095 JK |
25217 | return cu->header.version >= 5 ? §ions->loclists : §ions->loc; |
25218 | } | |
25219 | return (cu->header.version >= 5 ? &dwarf2_per_objfile->loclists | |
25220 | : &dwarf2_per_objfile->loc); | |
3019eac3 DE |
25221 | } |
25222 | ||
8cf6f0b1 TT |
25223 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
25224 | ||
25225 | static void | |
25226 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
25227 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 25228 | const struct attribute *attr) |
8cf6f0b1 | 25229 | { |
518817b3 SM |
25230 | struct dwarf2_per_objfile *dwarf2_per_objfile |
25231 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 DE |
25232 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
25233 | ||
25234 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
25235 | |
25236 | baton->per_cu = cu->per_cu; | |
25237 | gdb_assert (baton->per_cu); | |
25238 | /* We don't know how long the location list is, but make sure we | |
25239 | don't run off the edge of the section. */ | |
3019eac3 DE |
25240 | baton->size = section->size - DW_UNSND (attr); |
25241 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 25242 | baton->base_address = cu->base_address; |
f664829e | 25243 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
25244 | } |
25245 | ||
4c2df51b | 25246 | static void |
ff39bb5e | 25247 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 25248 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 25249 | { |
518817b3 SM |
25250 | struct dwarf2_per_objfile *dwarf2_per_objfile |
25251 | = cu->per_cu->dwarf2_per_objfile; | |
bb5ed363 | 25252 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 25253 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 25254 | |
3690dd37 | 25255 | if (attr_form_is_section_offset (attr) |
3019eac3 | 25256 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
25257 | the section. If so, fall through to the complaint in the |
25258 | other branch. */ | |
3019eac3 | 25259 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 25260 | { |
0d53c4c4 | 25261 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 25262 | |
8d749320 | 25263 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
4c2df51b | 25264 | |
8cf6f0b1 | 25265 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 25266 | |
d00adf39 | 25267 | if (cu->base_known == 0) |
b98664d3 | 25268 | complaint (_("Location list used without " |
3e43a32a | 25269 | "specifying the CU base address.")); |
4c2df51b | 25270 | |
f1e6e072 TT |
25271 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
25272 | ? dwarf2_loclist_block_index | |
25273 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
25274 | SYMBOL_LOCATION_BATON (sym) = baton; |
25275 | } | |
25276 | else | |
25277 | { | |
25278 | struct dwarf2_locexpr_baton *baton; | |
25279 | ||
8d749320 | 25280 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
ae0d2f24 UW |
25281 | baton->per_cu = cu->per_cu; |
25282 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
25283 | |
25284 | if (attr_form_is_block (attr)) | |
25285 | { | |
25286 | /* Note that we're just copying the block's data pointer | |
25287 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
25288 | info_buffer for SYM's objfile; right now we never release |
25289 | that buffer, but when we do clean up properly this may | |
25290 | need to change. */ | |
0d53c4c4 DJ |
25291 | baton->size = DW_BLOCK (attr)->size; |
25292 | baton->data = DW_BLOCK (attr)->data; | |
25293 | } | |
25294 | else | |
25295 | { | |
25296 | dwarf2_invalid_attrib_class_complaint ("location description", | |
25297 | SYMBOL_NATURAL_NAME (sym)); | |
25298 | baton->size = 0; | |
0d53c4c4 | 25299 | } |
6e70227d | 25300 | |
f1e6e072 TT |
25301 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
25302 | ? dwarf2_locexpr_block_index | |
25303 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
25304 | SYMBOL_LOCATION_BATON (sym) = baton; |
25305 | } | |
4c2df51b | 25306 | } |
6502dd73 | 25307 | |
9aa1f1e3 TT |
25308 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
25309 | came from a separate debuginfo file, then the master objfile is | |
25310 | returned. */ | |
ae0d2f24 UW |
25311 | |
25312 | struct objfile * | |
25313 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
25314 | { | |
e3b94546 | 25315 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
ae0d2f24 UW |
25316 | |
25317 | /* Return the master objfile, so that we can report and look up the | |
25318 | correct file containing this variable. */ | |
25319 | if (objfile->separate_debug_objfile_backlink) | |
25320 | objfile = objfile->separate_debug_objfile_backlink; | |
25321 | ||
25322 | return objfile; | |
25323 | } | |
25324 | ||
96408a79 SA |
25325 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
25326 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
25327 | CU_HEADERP first. */ | |
25328 | ||
25329 | static const struct comp_unit_head * | |
25330 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
25331 | struct dwarf2_per_cu_data *per_cu) | |
25332 | { | |
d521ce57 | 25333 | const gdb_byte *info_ptr; |
96408a79 SA |
25334 | |
25335 | if (per_cu->cu) | |
25336 | return &per_cu->cu->header; | |
25337 | ||
9c541725 | 25338 | info_ptr = per_cu->section->buffer + to_underlying (per_cu->sect_off); |
96408a79 SA |
25339 | |
25340 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
43988095 JK |
25341 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->section, |
25342 | rcuh_kind::COMPILE); | |
96408a79 SA |
25343 | |
25344 | return cu_headerp; | |
25345 | } | |
25346 | ||
ae0d2f24 UW |
25347 | /* Return the address size given in the compilation unit header for CU. */ |
25348 | ||
98714339 | 25349 | int |
ae0d2f24 UW |
25350 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
25351 | { | |
96408a79 SA |
25352 | struct comp_unit_head cu_header_local; |
25353 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 25354 | |
96408a79 SA |
25355 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
25356 | ||
25357 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
25358 | } |
25359 | ||
9eae7c52 TT |
25360 | /* Return the offset size given in the compilation unit header for CU. */ |
25361 | ||
25362 | int | |
25363 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
25364 | { | |
96408a79 SA |
25365 | struct comp_unit_head cu_header_local; |
25366 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 25367 | |
96408a79 SA |
25368 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
25369 | ||
25370 | return cu_headerp->offset_size; | |
25371 | } | |
25372 | ||
25373 | /* See its dwarf2loc.h declaration. */ | |
25374 | ||
25375 | int | |
25376 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
25377 | { | |
25378 | struct comp_unit_head cu_header_local; | |
25379 | const struct comp_unit_head *cu_headerp; | |
25380 | ||
25381 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
25382 | ||
25383 | if (cu_headerp->version == 2) | |
25384 | return cu_headerp->addr_size; | |
25385 | else | |
25386 | return cu_headerp->offset_size; | |
181cebd4 JK |
25387 | } |
25388 | ||
9aa1f1e3 TT |
25389 | /* Return the text offset of the CU. The returned offset comes from |
25390 | this CU's objfile. If this objfile came from a separate debuginfo | |
25391 | file, then the offset may be different from the corresponding | |
25392 | offset in the parent objfile. */ | |
25393 | ||
25394 | CORE_ADDR | |
25395 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
25396 | { | |
e3b94546 | 25397 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
9aa1f1e3 TT |
25398 | |
25399 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
25400 | } | |
25401 | ||
9a49df9d AB |
25402 | /* Return a type that is a generic pointer type, the size of which matches |
25403 | the address size given in the compilation unit header for PER_CU. */ | |
25404 | static struct type * | |
25405 | dwarf2_per_cu_addr_type (struct dwarf2_per_cu_data *per_cu) | |
25406 | { | |
25407 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; | |
25408 | struct type *void_type = objfile_type (objfile)->builtin_void; | |
25409 | struct type *addr_type = lookup_pointer_type (void_type); | |
25410 | int addr_size = dwarf2_per_cu_addr_size (per_cu); | |
25411 | ||
25412 | if (TYPE_LENGTH (addr_type) == addr_size) | |
25413 | return addr_type; | |
25414 | ||
25415 | addr_type | |
25416 | = dwarf2_per_cu_addr_sized_int_type (per_cu, TYPE_UNSIGNED (addr_type)); | |
25417 | return addr_type; | |
25418 | } | |
25419 | ||
43988095 JK |
25420 | /* Return DWARF version number of PER_CU. */ |
25421 | ||
25422 | short | |
25423 | dwarf2_version (struct dwarf2_per_cu_data *per_cu) | |
25424 | { | |
25425 | return per_cu->dwarf_version; | |
25426 | } | |
25427 | ||
348e048f DE |
25428 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
25429 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
25430 | |
25431 | static struct dwarf2_per_cu_data * | |
9c541725 | 25432 | dwarf2_find_containing_comp_unit (sect_offset sect_off, |
36586728 | 25433 | unsigned int offset_in_dwz, |
ed2dc618 | 25434 | struct dwarf2_per_objfile *dwarf2_per_objfile) |
ae038cb0 DJ |
25435 | { |
25436 | struct dwarf2_per_cu_data *this_cu; | |
25437 | int low, high; | |
25438 | ||
ae038cb0 | 25439 | low = 0; |
b76e467d | 25440 | high = dwarf2_per_objfile->all_comp_units.size () - 1; |
ae038cb0 DJ |
25441 | while (high > low) |
25442 | { | |
36586728 | 25443 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 25444 | int mid = low + (high - low) / 2; |
9a619af0 | 25445 | |
36586728 | 25446 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
36586728 | 25447 | if (mid_cu->is_dwz > offset_in_dwz |
81fbbaf9 | 25448 | || (mid_cu->is_dwz == offset_in_dwz |
45b8ae0c | 25449 | && mid_cu->sect_off + mid_cu->length >= sect_off)) |
ae038cb0 DJ |
25450 | high = mid; |
25451 | else | |
25452 | low = mid + 1; | |
25453 | } | |
25454 | gdb_assert (low == high); | |
36586728 | 25455 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
45b8ae0c | 25456 | if (this_cu->is_dwz != offset_in_dwz || this_cu->sect_off > sect_off) |
ae038cb0 | 25457 | { |
36586728 | 25458 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 | 25459 | error (_("Dwarf Error: could not find partial DIE containing " |
9d8780f0 SM |
25460 | "offset %s [in module %s]"), |
25461 | sect_offset_str (sect_off), | |
ed2dc618 | 25462 | bfd_get_filename (dwarf2_per_objfile->objfile->obfd)); |
10b3939b | 25463 | |
9c541725 PA |
25464 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->sect_off |
25465 | <= sect_off); | |
ae038cb0 DJ |
25466 | return dwarf2_per_objfile->all_comp_units[low-1]; |
25467 | } | |
25468 | else | |
25469 | { | |
b76e467d | 25470 | if (low == dwarf2_per_objfile->all_comp_units.size () - 1 |
9c541725 | 25471 | && sect_off >= this_cu->sect_off + this_cu->length) |
9d8780f0 | 25472 | error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off)); |
9c541725 | 25473 | gdb_assert (sect_off < this_cu->sect_off + this_cu->length); |
ae038cb0 DJ |
25474 | return this_cu; |
25475 | } | |
25476 | } | |
25477 | ||
23745b47 | 25478 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 25479 | |
fcd3b13d SM |
25480 | dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data *per_cu_) |
25481 | : per_cu (per_cu_), | |
9068261f AB |
25482 | mark (false), |
25483 | has_loclist (false), | |
25484 | checked_producer (false), | |
25485 | producer_is_gxx_lt_4_6 (false), | |
25486 | producer_is_gcc_lt_4_3 (false), | |
eb77c9df | 25487 | producer_is_icc (false), |
9068261f | 25488 | producer_is_icc_lt_14 (false), |
c258c396 | 25489 | producer_is_codewarrior (false), |
9068261f | 25490 | processing_has_namespace_info (false) |
93311388 | 25491 | { |
fcd3b13d SM |
25492 | per_cu->cu = this; |
25493 | } | |
25494 | ||
25495 | /* Destroy a dwarf2_cu. */ | |
25496 | ||
25497 | dwarf2_cu::~dwarf2_cu () | |
25498 | { | |
25499 | per_cu->cu = NULL; | |
9816fde3 JK |
25500 | } |
25501 | ||
25502 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
25503 | ||
25504 | static void | |
95554aad TT |
25505 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
25506 | enum language pretend_language) | |
9816fde3 JK |
25507 | { |
25508 | struct attribute *attr; | |
25509 | ||
25510 | /* Set the language we're debugging. */ | |
25511 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
25512 | if (attr) | |
25513 | set_cu_language (DW_UNSND (attr), cu); | |
25514 | else | |
9cded63f | 25515 | { |
95554aad | 25516 | cu->language = pretend_language; |
9cded63f TT |
25517 | cu->language_defn = language_def (cu->language); |
25518 | } | |
dee91e82 | 25519 | |
7d45c7c3 | 25520 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
93311388 DE |
25521 | } |
25522 | ||
ae038cb0 DJ |
25523 | /* Increase the age counter on each cached compilation unit, and free |
25524 | any that are too old. */ | |
25525 | ||
25526 | static void | |
ed2dc618 | 25527 | age_cached_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
ae038cb0 DJ |
25528 | { |
25529 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
25530 | ||
25531 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
25532 | per_cu = dwarf2_per_objfile->read_in_chain; | |
25533 | while (per_cu != NULL) | |
25534 | { | |
25535 | per_cu->cu->last_used ++; | |
b4f54984 | 25536 | if (per_cu->cu->last_used <= dwarf_max_cache_age) |
ae038cb0 DJ |
25537 | dwarf2_mark (per_cu->cu); |
25538 | per_cu = per_cu->cu->read_in_chain; | |
25539 | } | |
25540 | ||
25541 | per_cu = dwarf2_per_objfile->read_in_chain; | |
25542 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
25543 | while (per_cu != NULL) | |
25544 | { | |
25545 | struct dwarf2_per_cu_data *next_cu; | |
25546 | ||
25547 | next_cu = per_cu->cu->read_in_chain; | |
25548 | ||
25549 | if (!per_cu->cu->mark) | |
25550 | { | |
fcd3b13d | 25551 | delete per_cu->cu; |
ae038cb0 DJ |
25552 | *last_chain = next_cu; |
25553 | } | |
25554 | else | |
25555 | last_chain = &per_cu->cu->read_in_chain; | |
25556 | ||
25557 | per_cu = next_cu; | |
25558 | } | |
25559 | } | |
25560 | ||
25561 | /* Remove a single compilation unit from the cache. */ | |
25562 | ||
25563 | static void | |
dee91e82 | 25564 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
25565 | { |
25566 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
ed2dc618 SM |
25567 | struct dwarf2_per_objfile *dwarf2_per_objfile |
25568 | = target_per_cu->dwarf2_per_objfile; | |
ae038cb0 DJ |
25569 | |
25570 | per_cu = dwarf2_per_objfile->read_in_chain; | |
25571 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
25572 | while (per_cu != NULL) | |
25573 | { | |
25574 | struct dwarf2_per_cu_data *next_cu; | |
25575 | ||
25576 | next_cu = per_cu->cu->read_in_chain; | |
25577 | ||
dee91e82 | 25578 | if (per_cu == target_per_cu) |
ae038cb0 | 25579 | { |
fcd3b13d | 25580 | delete per_cu->cu; |
dee91e82 | 25581 | per_cu->cu = NULL; |
ae038cb0 DJ |
25582 | *last_chain = next_cu; |
25583 | break; | |
25584 | } | |
25585 | else | |
25586 | last_chain = &per_cu->cu->read_in_chain; | |
25587 | ||
25588 | per_cu = next_cu; | |
25589 | } | |
25590 | } | |
25591 | ||
dee91e82 DE |
25592 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
25593 | We store these in a hash table separate from the DIEs, and preserve them | |
25594 | when the DIEs are flushed out of cache. | |
25595 | ||
25596 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 25597 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
25598 | or the type may come from a DWO file. Furthermore, while it's more logical |
25599 | to use per_cu->section+offset, with Fission the section with the data is in | |
25600 | the DWO file but we don't know that section at the point we need it. | |
25601 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
25602 | because we can enter the lookup routine, get_die_type_at_offset, from | |
25603 | outside this file, and thus won't necessarily have PER_CU->cu. | |
25604 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 25605 | |
dee91e82 | 25606 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 25607 | { |
dee91e82 | 25608 | const struct dwarf2_per_cu_data *per_cu; |
9c541725 | 25609 | sect_offset sect_off; |
1c379e20 DJ |
25610 | struct type *type; |
25611 | }; | |
25612 | ||
dee91e82 | 25613 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
25614 | |
25615 | static hashval_t | |
dee91e82 | 25616 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 25617 | { |
9a3c8263 SM |
25618 | const struct dwarf2_per_cu_offset_and_type *ofs |
25619 | = (const struct dwarf2_per_cu_offset_and_type *) item; | |
9a619af0 | 25620 | |
9c541725 | 25621 | return (uintptr_t) ofs->per_cu + to_underlying (ofs->sect_off); |
1c379e20 DJ |
25622 | } |
25623 | ||
dee91e82 | 25624 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
25625 | |
25626 | static int | |
dee91e82 | 25627 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 25628 | { |
9a3c8263 SM |
25629 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
25630 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; | |
25631 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs | |
25632 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; | |
9a619af0 | 25633 | |
dee91e82 | 25634 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
9c541725 | 25635 | && ofs_lhs->sect_off == ofs_rhs->sect_off); |
1c379e20 DJ |
25636 | } |
25637 | ||
25638 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
25639 | table if necessary. For convenience, return TYPE. |
25640 | ||
25641 | The DIEs reading must have careful ordering to: | |
25642 | * Not cause infite loops trying to read in DIEs as a prerequisite for | |
25643 | reading current DIE. | |
25644 | * Not trying to dereference contents of still incompletely read in types | |
25645 | while reading in other DIEs. | |
25646 | * Enable referencing still incompletely read in types just by a pointer to | |
25647 | the type without accessing its fields. | |
25648 | ||
25649 | Therefore caller should follow these rules: | |
25650 | * Try to fetch any prerequisite types we may need to build this DIE type | |
25651 | before building the type and calling set_die_type. | |
e71ec853 | 25652 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
25653 | possible before fetching more types to complete the current type. |
25654 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 25655 | |
f792889a | 25656 | static struct type * |
1c379e20 DJ |
25657 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
25658 | { | |
518817b3 SM |
25659 | struct dwarf2_per_objfile *dwarf2_per_objfile |
25660 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 25661 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
ed2dc618 | 25662 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3cdcd0ce JB |
25663 | struct attribute *attr; |
25664 | struct dynamic_prop prop; | |
1c379e20 | 25665 | |
b4ba55a1 JB |
25666 | /* For Ada types, make sure that the gnat-specific data is always |
25667 | initialized (if not already set). There are a few types where | |
25668 | we should not be doing so, because the type-specific area is | |
25669 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
25670 | where the type-specific area is used to store the floatformat). | |
25671 | But this is not a problem, because the gnat-specific information | |
25672 | is actually not needed for these types. */ | |
25673 | if (need_gnat_info (cu) | |
25674 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
25675 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
09e2d7c7 DE |
25676 | && TYPE_CODE (type) != TYPE_CODE_METHODPTR |
25677 | && TYPE_CODE (type) != TYPE_CODE_MEMBERPTR | |
25678 | && TYPE_CODE (type) != TYPE_CODE_METHOD | |
b4ba55a1 JB |
25679 | && !HAVE_GNAT_AUX_INFO (type)) |
25680 | INIT_GNAT_SPECIFIC (type); | |
25681 | ||
3f2f83dd KB |
25682 | /* Read DW_AT_allocated and set in type. */ |
25683 | attr = dwarf2_attr (die, DW_AT_allocated, cu); | |
25684 | if (attr_form_is_block (attr)) | |
25685 | { | |
9a49df9d AB |
25686 | struct type *prop_type |
25687 | = dwarf2_per_cu_addr_sized_int_type (cu->per_cu, false); | |
25688 | if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) | |
50a82047 | 25689 | add_dyn_prop (DYN_PROP_ALLOCATED, prop, type); |
3f2f83dd KB |
25690 | } |
25691 | else if (attr != NULL) | |
25692 | { | |
b98664d3 | 25693 | complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"), |
9c541725 | 25694 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), |
9d8780f0 | 25695 | sect_offset_str (die->sect_off)); |
3f2f83dd KB |
25696 | } |
25697 | ||
25698 | /* Read DW_AT_associated and set in type. */ | |
25699 | attr = dwarf2_attr (die, DW_AT_associated, cu); | |
25700 | if (attr_form_is_block (attr)) | |
25701 | { | |
9a49df9d AB |
25702 | struct type *prop_type |
25703 | = dwarf2_per_cu_addr_sized_int_type (cu->per_cu, false); | |
25704 | if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) | |
50a82047 | 25705 | add_dyn_prop (DYN_PROP_ASSOCIATED, prop, type); |
3f2f83dd KB |
25706 | } |
25707 | else if (attr != NULL) | |
25708 | { | |
b98664d3 | 25709 | complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"), |
9c541725 | 25710 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), |
9d8780f0 | 25711 | sect_offset_str (die->sect_off)); |
3f2f83dd KB |
25712 | } |
25713 | ||
3cdcd0ce JB |
25714 | /* Read DW_AT_data_location and set in type. */ |
25715 | attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
9a49df9d AB |
25716 | if (attr_to_dynamic_prop (attr, die, cu, &prop, |
25717 | dwarf2_per_cu_addr_type (cu->per_cu))) | |
50a82047 | 25718 | add_dyn_prop (DYN_PROP_DATA_LOCATION, prop, type); |
3cdcd0ce | 25719 | |
dee91e82 | 25720 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 25721 | { |
dee91e82 DE |
25722 | dwarf2_per_objfile->die_type_hash = |
25723 | htab_create_alloc_ex (127, | |
25724 | per_cu_offset_and_type_hash, | |
25725 | per_cu_offset_and_type_eq, | |
25726 | NULL, | |
25727 | &objfile->objfile_obstack, | |
25728 | hashtab_obstack_allocate, | |
25729 | dummy_obstack_deallocate); | |
f792889a | 25730 | } |
1c379e20 | 25731 | |
dee91e82 | 25732 | ofs.per_cu = cu->per_cu; |
9c541725 | 25733 | ofs.sect_off = die->sect_off; |
1c379e20 | 25734 | ofs.type = type; |
dee91e82 DE |
25735 | slot = (struct dwarf2_per_cu_offset_and_type **) |
25736 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 | 25737 | if (*slot) |
b98664d3 | 25738 | complaint (_("A problem internal to GDB: DIE %s has type already set"), |
9d8780f0 | 25739 | sect_offset_str (die->sect_off)); |
8d749320 SM |
25740 | *slot = XOBNEW (&objfile->objfile_obstack, |
25741 | struct dwarf2_per_cu_offset_and_type); | |
1c379e20 | 25742 | **slot = ofs; |
f792889a | 25743 | return type; |
1c379e20 DJ |
25744 | } |
25745 | ||
9c541725 | 25746 | /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash, |
02142a6c | 25747 | or return NULL if the die does not have a saved type. */ |
1c379e20 DJ |
25748 | |
25749 | static struct type * | |
9c541725 | 25750 | get_die_type_at_offset (sect_offset sect_off, |
673bfd45 | 25751 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 25752 | { |
dee91e82 | 25753 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
ed2dc618 | 25754 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
f792889a | 25755 | |
dee91e82 | 25756 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 25757 | return NULL; |
1c379e20 | 25758 | |
dee91e82 | 25759 | ofs.per_cu = per_cu; |
9c541725 | 25760 | ofs.sect_off = sect_off; |
9a3c8263 SM |
25761 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
25762 | htab_find (dwarf2_per_objfile->die_type_hash, &ofs)); | |
1c379e20 DJ |
25763 | if (slot) |
25764 | return slot->type; | |
25765 | else | |
25766 | return NULL; | |
25767 | } | |
25768 | ||
02142a6c | 25769 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
25770 | or return NULL if DIE does not have a saved type. */ |
25771 | ||
25772 | static struct type * | |
25773 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
25774 | { | |
9c541725 | 25775 | return get_die_type_at_offset (die->sect_off, cu->per_cu); |
673bfd45 DE |
25776 | } |
25777 | ||
10b3939b DJ |
25778 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
25779 | ||
25780 | static void | |
25781 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
25782 | struct dwarf2_per_cu_data *ref_per_cu) | |
25783 | { | |
25784 | void **slot; | |
25785 | ||
25786 | if (cu->dependencies == NULL) | |
25787 | cu->dependencies | |
25788 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
25789 | NULL, &cu->comp_unit_obstack, | |
25790 | hashtab_obstack_allocate, | |
25791 | dummy_obstack_deallocate); | |
25792 | ||
25793 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
25794 | if (*slot == NULL) | |
25795 | *slot = ref_per_cu; | |
25796 | } | |
1c379e20 | 25797 | |
f504f079 DE |
25798 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
25799 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
25800 | cache that we must keep because we are keeping CU. */ |
25801 | ||
10b3939b DJ |
25802 | static int |
25803 | dwarf2_mark_helper (void **slot, void *data) | |
25804 | { | |
25805 | struct dwarf2_per_cu_data *per_cu; | |
25806 | ||
25807 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
25808 | |
25809 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
25810 | reading of the chain. As such dependencies remain valid it is not much | |
25811 | useful to track and undo them during QUIT cleanups. */ | |
25812 | if (per_cu->cu == NULL) | |
25813 | return 1; | |
25814 | ||
10b3939b DJ |
25815 | if (per_cu->cu->mark) |
25816 | return 1; | |
9068261f | 25817 | per_cu->cu->mark = true; |
10b3939b DJ |
25818 | |
25819 | if (per_cu->cu->dependencies != NULL) | |
25820 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
25821 | ||
25822 | return 1; | |
25823 | } | |
25824 | ||
f504f079 DE |
25825 | /* Set the mark field in CU and in every other compilation unit in the |
25826 | cache that we must keep because we are keeping CU. */ | |
25827 | ||
ae038cb0 DJ |
25828 | static void |
25829 | dwarf2_mark (struct dwarf2_cu *cu) | |
25830 | { | |
25831 | if (cu->mark) | |
25832 | return; | |
9068261f | 25833 | cu->mark = true; |
10b3939b DJ |
25834 | if (cu->dependencies != NULL) |
25835 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
25836 | } |
25837 | ||
25838 | static void | |
25839 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
25840 | { | |
25841 | while (per_cu) | |
25842 | { | |
9068261f | 25843 | per_cu->cu->mark = false; |
ae038cb0 DJ |
25844 | per_cu = per_cu->cu->read_in_chain; |
25845 | } | |
72bf9492 DJ |
25846 | } |
25847 | ||
72bf9492 DJ |
25848 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
25849 | is its offset in .debug_info for this objfile. */ | |
25850 | ||
25851 | static hashval_t | |
25852 | partial_die_hash (const void *item) | |
25853 | { | |
9a3c8263 SM |
25854 | const struct partial_die_info *part_die |
25855 | = (const struct partial_die_info *) item; | |
9a619af0 | 25856 | |
9c541725 | 25857 | return to_underlying (part_die->sect_off); |
72bf9492 DJ |
25858 | } |
25859 | ||
25860 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
25861 | are equal if they have the same offset. */ | |
25862 | ||
25863 | static int | |
25864 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
25865 | { | |
9a3c8263 SM |
25866 | const struct partial_die_info *part_die_lhs |
25867 | = (const struct partial_die_info *) item_lhs; | |
25868 | const struct partial_die_info *part_die_rhs | |
25869 | = (const struct partial_die_info *) item_rhs; | |
9a619af0 | 25870 | |
9c541725 | 25871 | return part_die_lhs->sect_off == part_die_rhs->sect_off; |
72bf9492 DJ |
25872 | } |
25873 | ||
3c3bb058 AB |
25874 | struct cmd_list_element *set_dwarf_cmdlist; |
25875 | struct cmd_list_element *show_dwarf_cmdlist; | |
ae038cb0 DJ |
25876 | |
25877 | static void | |
981a3fb3 | 25878 | set_dwarf_cmd (const char *args, int from_tty) |
ae038cb0 | 25879 | { |
b4f54984 | 25880 | help_list (set_dwarf_cmdlist, "maintenance set dwarf ", all_commands, |
635c7e8a | 25881 | gdb_stdout); |
ae038cb0 DJ |
25882 | } |
25883 | ||
25884 | static void | |
981a3fb3 | 25885 | show_dwarf_cmd (const char *args, int from_tty) |
6e70227d | 25886 | { |
b4f54984 | 25887 | cmd_show_list (show_dwarf_cmdlist, from_tty, ""); |
ae038cb0 DJ |
25888 | } |
25889 | ||
491144b5 | 25890 | bool dwarf_always_disassemble; |
437afbb8 | 25891 | |
437afbb8 | 25892 | static void |
cd4fb1b2 SM |
25893 | show_dwarf_always_disassemble (struct ui_file *file, int from_tty, |
25894 | struct cmd_list_element *c, const char *value) | |
9291a0cd | 25895 | { |
cd4fb1b2 SM |
25896 | fprintf_filtered (file, |
25897 | _("Whether to always disassemble " | |
25898 | "DWARF expressions is %s.\n"), | |
25899 | value); | |
9291a0cd TT |
25900 | } |
25901 | ||
9291a0cd | 25902 | static void |
cd4fb1b2 SM |
25903 | show_check_physname (struct ui_file *file, int from_tty, |
25904 | struct cmd_list_element *c, const char *value) | |
9291a0cd | 25905 | { |
cd4fb1b2 SM |
25906 | fprintf_filtered (file, |
25907 | _("Whether to check \"physname\" is %s.\n"), | |
25908 | value); | |
9291a0cd TT |
25909 | } |
25910 | ||
cd4fb1b2 SM |
25911 | void |
25912 | _initialize_dwarf2_read (void) | |
9291a0cd | 25913 | { |
cd4fb1b2 SM |
25914 | add_prefix_cmd ("dwarf", class_maintenance, set_dwarf_cmd, _("\ |
25915 | Set DWARF specific variables.\n\ | |
590042fc | 25916 | Configure DWARF variables such as the cache size."), |
cd4fb1b2 SM |
25917 | &set_dwarf_cmdlist, "maintenance set dwarf ", |
25918 | 0/*allow-unknown*/, &maintenance_set_cmdlist); | |
156942c7 | 25919 | |
cd4fb1b2 | 25920 | add_prefix_cmd ("dwarf", class_maintenance, show_dwarf_cmd, _("\ |
590042fc PW |
25921 | Show DWARF specific variables.\n\ |
25922 | Show DWARF variables such as the cache size."), | |
cd4fb1b2 SM |
25923 | &show_dwarf_cmdlist, "maintenance show dwarf ", |
25924 | 0/*allow-unknown*/, &maintenance_show_cmdlist); | |
156942c7 | 25925 | |
cd4fb1b2 SM |
25926 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, |
25927 | &dwarf_max_cache_age, _("\ | |
25928 | Set the upper bound on the age of cached DWARF compilation units."), _("\ | |
25929 | Show the upper bound on the age of cached DWARF compilation units."), _("\ | |
25930 | A higher limit means that cached compilation units will be stored\n\ | |
25931 | in memory longer, and more total memory will be used. Zero disables\n\ | |
25932 | caching, which can slow down startup."), | |
25933 | NULL, | |
25934 | show_dwarf_max_cache_age, | |
25935 | &set_dwarf_cmdlist, | |
25936 | &show_dwarf_cmdlist); | |
156942c7 | 25937 | |
cd4fb1b2 SM |
25938 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
25939 | &dwarf_always_disassemble, _("\ | |
25940 | Set whether `info address' always disassembles DWARF expressions."), _("\ | |
25941 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
25942 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
25943 | syntax. When disabled, expressions will be printed in a more\n\ | |
25944 | conversational style, when possible."), | |
25945 | NULL, | |
25946 | show_dwarf_always_disassemble, | |
25947 | &set_dwarf_cmdlist, | |
25948 | &show_dwarf_cmdlist); | |
9291a0cd | 25949 | |
cd4fb1b2 SM |
25950 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ |
25951 | Set debugging of the DWARF reader."), _("\ | |
25952 | Show debugging of the DWARF reader."), _("\ | |
25953 | When enabled (non-zero), debugging messages are printed during DWARF\n\ | |
25954 | reading and symtab expansion. A value of 1 (one) provides basic\n\ | |
25955 | information. A value greater than 1 provides more verbose information."), | |
25956 | NULL, | |
25957 | NULL, | |
25958 | &setdebuglist, &showdebuglist); | |
9291a0cd | 25959 | |
cd4fb1b2 SM |
25960 | add_setshow_zuinteger_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
25961 | Set debugging of the DWARF DIE reader."), _("\ | |
25962 | Show debugging of the DWARF DIE reader."), _("\ | |
25963 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ | |
25964 | The value is the maximum depth to print."), | |
25965 | NULL, | |
25966 | NULL, | |
25967 | &setdebuglist, &showdebuglist); | |
9291a0cd | 25968 | |
cd4fb1b2 SM |
25969 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
25970 | Set debugging of the dwarf line reader."), _("\ | |
25971 | Show debugging of the dwarf line reader."), _("\ | |
25972 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ | |
25973 | A value of 1 (one) provides basic information.\n\ | |
25974 | A value greater than 1 provides more verbose information."), | |
25975 | NULL, | |
25976 | NULL, | |
25977 | &setdebuglist, &showdebuglist); | |
437afbb8 | 25978 | |
cd4fb1b2 SM |
25979 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
25980 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
25981 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
25982 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
25983 | the demangler."), | |
25984 | NULL, show_check_physname, | |
25985 | &setdebuglist, &showdebuglist); | |
900e11f9 | 25986 | |
e615022a DE |
25987 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
25988 | no_class, &use_deprecated_index_sections, _("\ | |
25989 | Set whether to use deprecated gdb_index sections."), _("\ | |
25990 | Show whether to use deprecated gdb_index sections."), _("\ | |
25991 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
25992 | Normally they are ignored either because of a missing feature or\n\ | |
25993 | performance issue.\n\ | |
25994 | Warning: This option must be enabled before gdb reads the file."), | |
25995 | NULL, | |
25996 | NULL, | |
25997 | &setlist, &showlist); | |
25998 | ||
f1e6e072 TT |
25999 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, |
26000 | &dwarf2_locexpr_funcs); | |
26001 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
26002 | &dwarf2_loclist_funcs); | |
26003 | ||
26004 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
26005 | &dwarf2_block_frame_base_locexpr_funcs); | |
26006 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
26007 | &dwarf2_block_frame_base_loclist_funcs); | |
c62446b1 PA |
26008 | |
26009 | #if GDB_SELF_TEST | |
26010 | selftests::register_test ("dw2_expand_symtabs_matching", | |
26011 | selftests::dw2_expand_symtabs_matching::run_test); | |
26012 | #endif | |
6502dd73 | 26013 | } |